FIELD MANUAL

GUIDES.

POPULAR GUIDES

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HOW LONG DO HAND WARMERS LAST?

Most hand warmers last between 6 and 12 hours, but not all heat is created equal. Learn what...

HAND WARMER GUIDES

WHY ARE MY HANDS ALWAYS COLD?

What cold hands can mean, why it happens, and what actually helps. Some questions have much bigger search...

HAND WARMER GUIDES

DISPOSABLE VS. RECHARGEABLE HAND WARMERS

Which type of hand warmer is actually better? There are two dominant philosophies of warmth. One you charge....

HAND WARMER GUIDES

USE CASES

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Why your hands get cold when gaming, and what warm hands do for your aim

Cold hands cost precision. The science of why hands get cold during long gaming sessions, and what warmth...

USE CASES

The hand warm-up routine: how to lock in before you queue

A five-minute hand warm-up routine for gamers: circulation, stretches, and heat before you queue. Win before you start.

USE CASES

BEST HAND WARMER FOR SKIING, SNOWBOARDING, AND LONG DAYS ON THE MOUNTAIN

Because sometimes the coldest part of a ski day isn’t the run. Cold on a mountain has its...

USE CASES

BEHIND PREFIRE

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How to actually use a hand warmer (3-min activation guide)

Rip open, shake well, get heated. Here's the full 3-minute activation procedure with pro tips.

BEHIND-PREFIRE

The chemistry inside every hand warmer (since 1923)

Iron, salt, water, activated charcoal, vermiculite. Patented in 1923. Still inside every disposable hand warmer.

BEHIND-PREFIRE

PREF*RE vs HotHands: a head-to-head comparison

HotHands has been the default for 30+ years. Here's where they win and where PREF*RE wins.

BEHIND-PREFIRE