Features: 100% brand new and high quality Safe, natural long lasting heat, odorless, disposable, single-use item, do not apply directly to the skin. Remove warmer from outer package, shake to activate. Warmer heats up in 15-30 minutes. If heat decreases, expose warmer to air and shake. Single use air-activated heat packs that provide every day warmth and are ideal for keeping your body warm when the temperature gets cold. Safe to use. Friendly and natural materials without peculiar smell. Heating time lasting up to 10 hours, Average temperature 55C. Great for outdoor sporting events, hunting, fishing, camping, hiking, working in the yard, jogging or taking your pet for a walk. Convenient, compact, portable. Easy to store, can be stored in a backpack, suitcase or jacket pocket. Specification: Material: Aluminum Color: As pictures shown. Warmer Size: app. 10x13cm/3.94x5.12in Pacakge Size: app. 11x14cm/4.33x5.51in Continuous Heating Temperature: 55 Heating Time: about 10 hours Quantity: 1 pack(10pcs) Cautions: 1. Product should affixed to the outside of socks, do not directly attached to the skin. 2. Please be careful low-temperature burns.long-time body heat will produce erythema, blisters and other symptoms. Do not use it while sleeping at night. 3. Pregnant women and diabetic patients and blocked the blood circulation is required to use under the guidance of a doctor. 4. Children, the disabled or sensitive skin should use more attention in the low-temperature burns happen. 5. Please keep products, to avoid plastic packaging products, vacuum bags injury or damage, or product will fail. 6. Products in a dry, dark place to preserve. Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes: 1 pack(10pcs) x Disposable Hand Warmers(other accessories demo in the picture is not included.)