Beat the Cold with the HotHands® Neck Warmer! We've got you covered, no matter what cold stress situation you find yourself in. Each Neck Warmer lasts up to 8 hours and provides fast heat that doesn't need to be recharged or reheated. It's easy to use, convenient to pack in a backpack or toolbox, and can be disposed of with regular trash. HotHands® Warmers are made with natural ingredients that don't harm the environment and have a four year shelf life if stored in a cool, dry place. Purchase from a Ships from Amazon.com listing to ensure you get the best quality warmers.