The HotHands Insole Foot Warmers are perfect for anyone wanting concentrated warmth in cold weather conditions. Adhesive Insole Foot Warmers are air activated and ready to provide up to 9 hours of long lasting heat. These warmers have adhesive on one side to keep them securely in place. Use these warmers when hunting & fishing, tailgating at events, outdoor sporting events, camping & hiking, working in the yard, jogging or taking your pet for a walk.