Ez Heat Reusable Instant Handwarmer - Lasts up to 3 Hours Quality tested and ensured for maximum durability Designed with only the toughest, roughest users in mind Comfort and performance come hand in hand with rothco Safe, instant heat on command Rechargeable for multiple uses without having to replace Safe, instant heat on command Rechargeable for multiple uses without having to replace Great for hunters, fishermen, hikers or anyone who spends time outdoors in cold weather Warms up to 130 F in seconds