Ignik 24-Hour Compostable XL Body and Sleeping Bag Warmers with Resealable AirBarrier Pouch, 4 Pairs

4 pairs of air-activated, high-performance biodegradable XL warmers, in recyclable packaging, for more heat with less waste Each oversize warmer provides up to 24 hours of heat; reusable AirBarrier Pouch minimizes air permeability and can save unused warmer heat for up to 72 hours, for intermittent use Warmers are 98 percent biodegradable (contents can be composted after use); safe, comfortable heat provided by natural minerals and oxygen Easily activated by removing from packaging and exposing to air; tuck into a sleeping bag or clothing for cold-weather camping, ski touring, hunting, and winter recreation; For best results, allow 10-15 minutes after opening for full heat activation via oxygen exposure. Includes 4 pairs of XL warmers (2 per resealable package); each warmer measures 4 x 5.3 inches, and weighs 136 grams