description Stop putting your hands in your armpits to warm them up. Bust open one of these, shake 'em like maracas, and enjoy the simple comfort of warm hands. Use it anywhere from the ski slopes to your cold morning commute. Stays warm for up to 8 hours Air-activated Disposable Not HSA/FSA Approved ⚠WARNING: Reproductive Harm - https://www.p65warnings.ca.gov/