Ignik Hand Warmers 20 pair. If you don't use all your heat simply reseal your partially used warmer in the AirBarrier pouch and reactivate the remaining heat up to 3 days later. We believe that you should use all your heat. Also the inside contents are 100percent biodegradable and the packaging and outer are recyclable. Specifications for Ignik Hand Warmers: Manufacturer: Ignik Application: Outdoor Size: 2 x 3.7 in Gender: Unisex Fabric/Material: Vermiculite Natural Materials Salt Iron Seasonal/Temperature Use: Cold Weather Weight: 45 g Heat Duration: 10 hours Features of Ignik Hand Warmers LESS WASTE Made from 98percent biodegradable materials. LONGER LASTING More heat than the leading brands. RESEALABLE TOP Patent-pending resealable top to store warmer for later use. AIRBARRIER Pouch that keeps air out for more reliable heat. 100percent recyclable. Package Contents: Ignik Hand Warmers Ignik IGAIR-00122PR-20: Hand Warmers 20 pair