DETAILS & DESIGN: Air activated toe warmers, great for winter recreation, backpacking, camping, hunting, and foot & core warmth Provides reliable, consistent, long-lasting heat AirBarrier pouch keeps more air out for more reliable heat Pouch can be closed to store unused warmers for up to 72 hours Each warmer lasts up to 8 hours Sticky back on each warmer allows them to be attached where needed so they won't slide around Outer pouch is 100% recyclable 98% Biodegradable natural chemicals inside can be dumped and are a natural fertilizer