Great for warming hands, feet and any body part. This convenient, air-activated 2-piece Heat Pack Hand Warmer Set features ultra-thin pads that warm to 65 degrees Celsius/149 degrees Fahrenheit when opened. Heat lasts approximately 12 hours. Keep one in the car and first aid kits. Outdoor workers, professional athletes, sporting enthusiasts, spectators, and anyone wanting safe, natural warmth can rely on these heat packs. Countertop display comes with 24 pieces.