Portable heat for your feet! Air-activated Grabber Toe Warmers keep feet and toes warm and toasty for over 6 hours! Thin with a unique rounded toe and adhesive backing, the Grabber Toe Warmers are specifically engineered to work in the low oxygen environment of shoes and boots. Just open a package of the foot warmers (there are 2 foot warmer adhesive strips inside a package). Simply stick a warmer to the outside of each sock, under or over your toes, and you'll instantly begin feeling soothing natural warmth. The Grabber Toe Warmer strips heat up as soon as they are exposed to oxygen! You'll want to bring these along for all your cold weather outdoor activities including snowshoeing, skiing, camping, hiking and more! Keep a spare package handy in your jacket or backpack for emergencies.