1. Soft imitation sherpa fabric, with upgraded touch feel and uniform temperature sensation, which can transfer and absorb heat and release surrounding areas to avoid burns caused by high temperature. 2. Strong sealing, no water leakage when squeezed and shaken 3. Warm your hands/warm your feet/warm your waist/warm your belly wherever you need it. 4. Material: plush, inner tank made of thickened PVC material 5. Keeping time: about 4-8 hours (the keeping time is related to the ambient temperature and is for reference only.) 6. Size: 35 x 25cm, weight about 230g 7. The amount of water filled should not exceed 2/3 of the capacity of the hot water bottle, and excess air should be eliminated at the same time.