The Hand Warmers are hand warmers from the brand Yaktrax, designed to provide 8 hours of heat after opening. Place them wherever you want: gloves, pockets, on your ears... They will be very useful in cold weather in the mountains. Weighing 45 grams, you can slip them anywhere to ensure you never get cold in the mountains.
Very good value for money. Heat last at least the 8 hours specified if not longer