20 Best Disposable Hand Warmers [2022]

Are you looking for the best disposable hand warmers? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling disposable hand warmers.

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# Preview Product
1 HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours of... HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours...
2 HotHands Warmers (20 Pair) HotHands Warmers (20 Pair)
3 HotHands HH20PRPK16 Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up To... HotHands HH20PRPK16 Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up...
4 HotHands Hand Warmer Value Pack (10 Pair) HotHands Hand Warmer Value Pack (10 Pair)
5 Hot Hand Warmers 11 Hours Long Lasting - 40 Count - Natural Odorless Safe Single Use Air Activated... Hot Hand Warmers 11 Hours Long Lasting - 40 Count - Natural Odorless Safe Single Use Air...
6 Grabber Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 7 Hours of... Grabber Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 7 Hours...
7 HotHands Body & Hand Super Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up... HotHands Body & Hand Super Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers -...
8 Hot Hand Warmers Heat Pack - 80 Count - 11 Hours Long Lasting Natural Safe and Odorless Single Use... Hot Hand Warmers Heat Pack - 80 Count - 11 Hours Long Lasting Natural Safe and Odorless Single...
9 IRIS USA Hand Warmers – 60 Individual Warmers, Long-Lasting Up To 10 Hours For Warm and hot hands... IRIS USA Hand Warmers – 60 Individual Warmers, Long-Lasting Up To 10 Hours For Warm and hot...
10 Hot Hand Warmers 10 Hours - 80 Count - Long Lasting Natural Safe and Odorless Single Use Air... Hot Hand Warmers 10 Hours - 80 Count - Long Lasting Natural Safe and Odorless Single Use Air...
11 MR.ICE 9 Packs Hand Warmers - Disposable Warm Pad - Long Lasting Safe Natural Odorless Air Activated... MR.ICE 9 Packs Hand Warmers - Disposable Warm Pad - Long Lasting Safe Natural Odorless Air...
12 HotHands HH2UDW320E Hand Warmers 54 Pair Super-Saver Pack, White HotHands HH2UDW320E Hand Warmers 54 Pair Super-Saver Pack, White
13 FVSA Hand Warmers Disposable 50pcs, 10 Hours Long Lasting Warm for Toe Body Foot Hand Arm Neck, Safe... FVSA Hand Warmers Disposable 50pcs, 10 Hours Long Lasting Warm for Toe Body Foot Hand Arm Neck,...
14 HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours of... HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours...
15 Hand Warmers (25 Packs) - Premium (Size: 3.5 inch x 4 inch, Duration: 12+ Hours, Max Temp: 163 F)... Hand Warmers (25 Packs) - Premium (Size: 3.5 inch x 4 inch, Duration: 12+ Hours, Max Temp: 163 F)...
16 HeatMax HotHands Hand Warmers, 12 Count (6 Pack with 2 Warmers per Pack) Up to 8 Hours of Heat HeatMax HotHands Hand Warmers, 12 Count (6 Pack with 2 Warmers per Pack) Up to 8 Hours of Heat
17 Happyday Hand Warmer 16 Hour – 30 Individual Disposable Warmers (Large Size: 5.5” x 4.1”) –... Happyday Hand Warmer 16 Hour – 30 Individual Disposable Warmers (Large Size: 5.5” x 4.1”)...
18 Hand Warmers Hot Hands Pockets Pack Foot Toe Feet Warmer Handwarmers Disposable Long Lasting Safe... Hand Warmers Hot Hands Pockets Pack Foot Toe Feet Warmer Handwarmers Disposable Long Lasting Safe...
19 Ignik 10-Hour Compostable Hand Warmers with Resealable AirBarrier Pouch, 4 Pairs Ignik 10-Hour Compostable Hand Warmers with Resealable AirBarrier Pouch, 4 Pairs
20 Air Activated Hand Warmers Heating Pads , Long Lasting Safe Odorless Natural Air-Activated Hot Heat... Air Activated Hand Warmers Heating Pads , Long Lasting Safe Odorless Natural Air-Activated Hot...
Bestseller No. 1
HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours of...
  • SAFE, NATURAL LONG-LASTING HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA using...
  • TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting & Fishing, Camping & Hiking, Working in The Yard, Jogging or Taking Your Pet for A...
SaleBestseller No. 2
HotHands Warmers (20 Pair)
  • Safe, natural long-lasting heat - odorless, disposable, single-use item, Do not apply directly to the skin. Tsar approved. Made in the USA using...
  • To activate - remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • Multipurpose warmers - single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • When to use: tailgating at events, outdoor sporting events, hunting & fishing, camping & hiking, working in the yard, jogging or taking your Pet for a...
Bestseller No. 3
HotHands HH20PRPK16 Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up To...
  • SAFE, NATURAL LONG-LASTING HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA using...
  • TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting & Fishing, Camping & Hiking, Working in The Yard, Jogging or Taking Your Pet for A...
SaleBestseller No. 4
HotHands Hand Warmer Value Pack (10 Pair)
  • SAFE, NATURAL LONG-LASTING HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA using...
  • TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting and Fishing, Camping and Hiking, Working in The Yard, Jogging or Taking Your Pet...
SaleBestseller No. 5
Hot Hand Warmers 11 Hours Long Lasting - 40 Count - Natural Odorless Safe Single Use Air Activated...
  • LONG-LASTING HEAT: Keep your hands toasty when it’s cold outside with up to 11 hours of heat. Use them in your gloves or pockets and instantly feel...
  • EASY TO ACTIVATE: Warmth is at your fingertips with these ready to use warmers. Receiving some instant warmth is easy because they’re air activated...
  • EASY TO ACTIVATE: Warmth is at your fingertips with these ready to use warmers. Receiving some instant warmth is easy because they’re air activated...
  • DISPOSABLE & SAFE: These single use hand warmers are made from ingredients that won’t harm the environment so you can toss them after each use. They...
  • DISPOSABLE & SAFE: These single use hand warmers are made from ingredients that won’t harm the environment so you can toss them after each use. They...
Bestseller No. 6
Grabber Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 7 Hours of...
  • Maintains heat for 7+ hours
  • Perfect for use with gloves or in pockets
  • Operates at an average temperature of 135 degrees, Warming Packs
  • Safe for travel
  • Designed for 1-time use
Bestseller No. 7
HotHands Body & Hand Super Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up...
  • SAFE, NATURAL LONG-LASTING HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA using...
  • TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting & Fishing, Camping & Hiking, Working in The Yard, Jogging or Taking Your Pet for A...
SaleBestseller No. 8
Hot Hand Warmers Heat Pack - 80 Count - 11 Hours Long Lasting Natural Safe and Odorless Single Use...
  • LONG-LASTING HEAT: Keep your hands toasty when it’s cold outside with up to 11 hours of heat. Use them in your gloves or pockets and instantly feel...
  • EASY TO ACTIVATE: Warmth is at your fingertips with these ready to use warmers. Receiving some instant warmth is easy because they’re air activated...
  • CONVENIENT & PORTABLE: These single use heat packs are great for traveling and they’re TSA approved. Each packet is compact and contains two warming...
  • DISPOSABLE & SAFE: These single use hand warmers are made from ingredients that won’t harm the environment so you can toss them after each use. They...
  • GREAT FOR OUTDOORS: When the weather gets cold and icy get some instant warmth through your hands or feet. They’re great for outdoor activities and...
Bestseller No. 9
IRIS USA Hand Warmers – 60 Individual Warmers, Long-Lasting Up To 10 Hours For Warm and hot hands...
  • SAFE LONG-LASTING HEAT: Air-activated, unscented, and ready to use. Heat duration lasts up to 10 hours (Regular) and 18 hours (Large). Max...
  • HEATS UP QUICKLY: Simply remove the IRIS USA long-lasting hand warmer from the package and gently shake to begin warming. It reaches the maximum...
  • ON THE GO: These single-use hand warmers are available in 2 convenient sizes; Regular (3.7" x 2.7") and Large (4.8" x 3.7"). Travel-sized and TSA...
  • ECO-CONSCIOUS & DISPOSABLE: The only ingredients are: iron powder, water, vermiculite, activated charcoal, salt, and high water absorption resin. Made...
  • OPEN AND GO: Open the package and remove the warmer. Gently shake the warmer and place it over your clothes or in your pocket. If the temperature...
Bestseller No. 10
Hot Hand Warmers 10 Hours - 80 Count - Long Lasting Natural Safe and Odorless Single Use Air...
  • LONG-LASTING HEAT: Keep your hands toasty when it’s cold outside with up to 10 hours of heat. Use them in your gloves or pockets and instantly feel...
  • EASY TO ACTIVATE: Warmth is at your fingertips with these ready to use warmers. Receiving some instant warmth is easy because they’re air activated...
  • CONVENIENT & PORTABLE: These single use heat packs are great for traveling and they’re TSA approved. Each packet is compact and contains two warming...
  • DISPOSABLE & SAFE: These single use hand warmers are made from ingredients that won’t harm the environment so you can toss them after each use. They...
  • GREAT FOR OUTDOORS: When the weather gets cold and icy get some instant warmth through your hands or feet. They’re great for outdoor activities and...
SaleBestseller No. 11
MR.ICE 9 Packs Hand Warmers - Disposable Warm Pad - Long Lasting Safe Natural Odorless Air Activated...
  • PREMIUM HAND WARMERS - One day one pack, provides long lasting up to 10 hours of heat in cold outside. 9 x 5.5 cm, small and soft, fit perfectly in...
  • SAFE, NON-TOXIC & ODORLESS - Single use air-activated heat packs to keep your hand and body warm in some brutal weather. They made from materials that...
  • TO ACTIVATE - Take hand warmers from outer pack, shake to activate, hand warmer heats up in 5-10 minutes. If heat decreases, expose warmer to air and...
  • GREAT FOR OUTDOORS - Various outdoor sporting activities, such as hunting, fishing, camping, hiking, skiing and more! Thin and flexible, conveniently...
  • MULTIPURPOSE WARMERS - Hand warmers as home essential, used in gloves, pockets, hats, and shoes to get warm and prevent frostbite. Also as perfect...
SaleBestseller No. 12
HotHands HH2UDW320E Hand Warmers 54 Pair Super-Saver Pack, White
  • Safe, natural long-lasting heat - odorless, disposable, single-use item, Do not apply directly to the skin. Tsar approved. Made in the USA using...
  • To activate - remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • Multipurpose warmers - single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • When to use: tailgating at events, outdoor sporting events, hunting & fishing, camping & hiking, working in the yard, jogging or taking your Pet for a...
Bestseller No. 13
FVSA Hand Warmers Disposable 50pcs, 10 Hours Long Lasting Warm for Toe Body Foot Hand Arm Neck, Safe...
  • LONG-LASTING HEAT: Keep your hands toasty when it’s cold outside with up to 10 hours of heat. Use them in your gloves or pockets and instantly feel...
  • EASY TO ACTIVATE: Warmth is at your fingertips with these ready to use warmers. Receiving some instant warmth is easy because they’re air activated...
  • CONVENIENT & PORTABLE: These single use heat packs are great for traveling and they’re TSA approved. Each packet is compact and contains two warming...
  • DISPOSABLE & SAFE: These single use hand warmers are made from ingredients that won’t harm the environment so you can toss them after each use. They...
  • GREAT FOR OUTDOORS: When the weather gets cold and icy get some instant warmth through your hands or feet. They’re great for outdoor activities and...
Bestseller No. 14
HotHands Hand Warmers - Long Lasting Safe Natural Odorless Air Activated Warmers - Up to 10 Hours of...
  • SAFE, NATURAL LONG-LASTING HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA using...
  • TO ACTIVATE - Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and...
  • MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm when the temperature...
  • WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting & Fishing, Camping & Hiking, Working in The Yard, Jogging or Taking Your Pet for A...
Bestseller No. 15
Hand Warmers (25 Packs) - Premium (Size: 3.5 inch x 4 inch, Duration: 12+ Hours, Max Temp: 163 F)...
  • (25 Pack) Hand Warmer - (Size: 3.5 inch x 4 inch, Duration: 12 + Hours, Max Temperature: 163 F). Hand Warmers Disposable
  • ACTIVATION - Shake and Massage gently to activate the warmer or when the temperature goes down during usage(Warmer heats up within 10 minutes) - AFTER...
  • PURPOSE - (Indoor)Office, school, home, church, & all indoor activities and (Outdoor)Camping, hiking, fishing, skiing, concerts, amusement park, & all...
  • EASY TO USE - Air-activated, ready to use, disposable, odorless, safe, & natural. NO harm to environment. NO electromagnetic waves. Each one is...
  • PRECAUTIONS - Please read precautions & directions carefully. Low-Temperature Burn. Do not use directly on the skin or while sleeping. Do not heat in...
Bestseller No. 16
HeatMax HotHands Hand Warmers, 12 Count (6 Pack with 2 Warmers per Pack) Up to 8 Hours of Heat
  • Package includes: 6 Pairs of Hand Warmers with 2 warmers per pack
  • SAFE, NATURAL LONG-LASTING 8 HOURS OF HEAT - Odorless, Disposable, Single-Use Item, Do Not Apply Directly to The Skin. TSA Approved. Made in the USA...
  • WHEN TO USE: Tailgating at Events, Outdoor Sporting Events, Hunting & Fishing, Camping & Hiking, Working in The Yard, Jogging or Taking Your Pet for A...
  • MULTIPURPOSE WARMERS - Single use air-activated heat packs that provide everyday warmth and are ideal for keeping your body warm for 8 hours. when the...
  • Made In The USA
Bestseller No. 17
Happyday Hand Warmer 16 Hour – 30 Individual Disposable Warmers (Large Size: 5.5” x 4.1”) –...
  • LONG LASTING HEAT DISSIPATION: Packed with a single warmer that can deliver 16 Hours of long lasting consistent warmth throughout the winter cold. The...
  • INSTANT HEAT: Once opened the air activated warmer will gradually heat up within 10 to 20 minutes. Natural heat is then generated through oxidation of...
  • LARGE SIZE for MULTIPLE USAGE : The large pack size allows you to contort the warmer and place it to core parts of the bodies like shoulders, back and...
  • CONSISTENT TEMPERATURES: The hand warmers will maintain an average temperature of 140F (60C) and never exceeding 158F (70C) depending on usage and...
  • HIGH QUALITY: Good quality hand warmers should be able to maintain at the right temperature for an extended period. Happyday hand warmers are true to...
SaleBestseller No. 18
Hand Warmers Hot Hands Pockets Pack Foot Toe Feet Warmer Handwarmers Disposable Long Lasting Safe...
  • Safe, Natural Long-Lasting Heat - Long lasting heat for more than 10 hours. They’re safe for adults and kids. After use, dispose with regular...
  • Easy to Activated - Remove warmer from the outer package: shake to activate. Ready to use Air Activated. Warmer heats up in 15-30 minutes. If heat...
  • Disposable, Single-Use Item - Hand warmers are single use air-activated heat packs that provide everyday warmth and are ideal for keeping your hands...
  • When to Use - Tailgating at Events, Outdoor Sporting Events, Skiing, Hunting, Fishing, Camping and Hiking, Working in the Yard, Jogging or Walking the...
  • The Perfect Gift - Great Convenience and value. It's a MUST HAVE to spend a cold winter, especially for Renault arthritis patients who need...
Bestseller No. 19
Ignik 10-Hour Compostable Hand Warmers with Resealable AirBarrier Pouch, 4 Pairs
  • 4 pairs of air-activated, high-performance biodegradable hand warmers, in recyclable packaging, for more heat with less waste
  • Each warmer provides up to 10 hours of heat; reusable AirBarrier Pouch minimizes air permeability and can save unused warmer heat for up to 72 hours,...
  • Warmers are 98 percent biodegradable (contents can be composted after use); safe, comfortable heat provided by natural minerals and oxygen
  • Easily activated by removing from packaging and exposing to air; ideal for camping, hiking, hunting, snowshoeing, skiing, dog walking and other cold...
  • Includes 4 pairs of hand warmers (2 per resealable package); each warmer measures 2 x 3.7 inches, and weighs 45 grams
Bestseller No. 20
Air Activated Hand Warmers Heating Pads , Long Lasting Safe Odorless Natural Air-Activated Hot Heat...
  • LONG LASTING HEAT, SAFE - Natural, Odorless, Disposable, Single-Use, Air Activated Heat Packs, stay warm for up to 8 hours. Note: DO NOT APPLY...
  • HOW TO USE: Remove warmer from outer package to activate. Disposable Warmer heats up in 15-30 minutes, up to 8 hours of heat lasting warmer. If body...
  • MULTIPURPOSE WARMERS - Single use air-activated hand warmers that provide everyday warmth and are ideal for keeping your body warm when the...
  • WHEN TO USE - Hand Warmer is perfect for Outdoor Entertainment and Working Outside, Sporting Events, Sking, Hunting & Fishing, Snowboarding, Ski,...
  • PACKAGE - 40 Packs (20 Pair)of Disposable Super Hand Warmers. If you have any questions, please feel free to contact us and we will respond to your...

Having trouble finding a great disposable hand warmers?

This problem is well understood by us because we have gone through the entire disposable hand warmers research process ourselves, which is why we have put together a comprehensive list of the best disposable hand warmerss available in the market today.

After hours of searching and using all the models on the market, we have found the best disposable hand warmers for 2022. See our ranking below!

How Do You Buy The Best Disposable Hand Warmers?

Do you get stressed out thinking about shopping for a great disposable hand warmers? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching disposable hand warmers, which is why we have assembled a comprehensive list of the greatest disposable hand warmers available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for disposable hand warmers that you consider buying. Your questions might include the following:

  • Is it worth buying an disposable hand warmers?
  • What benefits are there with buying an disposable hand warmers?
  • What factors deserve consideration when shopping for an effective disposable hand warmers?
  • Why is it crucial to invest in any disposable hand warmers, much less the best one?
  • Which disposable hand warmers are good in the current market?
  • Where can you find information like this about disposable hand warmers?

We’re convinced that you likely have far more questions than just these regarding disposable hand warmers, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for disposable hand warmers, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible disposable hand warmers. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an disposable hand warmers buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available disposable hand warmers currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of disposable hand warmers has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an disposable hand warmers?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your disposable hand warmers.
  5. Customer Ratings: Number ratings grade disposable hand warmers objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their disposable hand warmers.
  7. Product Quality: You don’t always get what you pay for with an disposable hand warmers, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an disposable hand warmers is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining disposable hand warmers information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding disposable hand warmers is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

Related Post:

FAQ:

Q: What’s the best hand warmer?

A: The Best Hand Warmer HotHands Hand Warmers. HotHands hand warmers are decidedly low tech and rely on the miracle of chemical reaction to produce their hand-saving effects. Zippo Hand Warmers. If you’ve ever attended a football game in December you know how hard it is to keep your hands warm. Zippo Rechargeable Hand Warmers. … Tundras Hand Warmers. … More items…

Q: How do re-usable hand warmers work?

A: How Reusable Hand Warmers Work. Reusable hand warmers start with the sodium acetate trihydrate solution in the liquid state . To get to the liquid state, the hand warmers were boiled to ensure the solution was raised above its boiling point of 136.4 °F/58 °C (to 137.12 °F/58.4 °C). The solution must be heated well above its melting point to become a supersaturated solution.

Q: What are hand warmers?

A: Hand warmers are small (mostly disposable) packets which are held in the hand and produce heat on demand to warm cold hands. They are commonly used in outdoor activities.