The Ignik Outdoors Biodegradable Hand Warmers provide reliable, consistent, and long-lasting heat for winter recreation, camping, and other cold weather activities. With a shake of the warmer, the air activates the warming agents in 5 to 10 minutes to get our hands feeling toasty. And the coolest part? When we're finished using them, we cut off the warmer sack and compost the remaining biodegradable product.