Hot Hand Warmers - 80 Count - Hand Warmers Disposable Single Use Air Activated Heat Packs for Hands, Toes and Body - Up to 12 Hours of HeatLong lastingHand warmers pads with up to 12 hours of warmth with an average temperature of 135F ComfortExra soft finger warmer with a handy size of 3. 3" x 2. 85". Easily fits into any glove and trouser pocket or jacket Natural material WarmSpark consist of iron powder, water, salt, activated carbon and vermiculite Easily useOpen the packaging and the hand warmers will heat up by themselves after a few minutes of exposure to oxygen When to useHand