Material: is made of natural rubber material. The heat preservation time is super long, which can keep you warm all night. Size: Portable measures 30x17cm. The soft short plush cover makes the hand warmer easy to put in. Best assistant: Use Cartoon after watching TV in cold weather, lying in bed, running for a long time or exercising. It keeps your hands and body warm at night. Perfect gift: Hand Warmer for Feet is an ideal gift for babies, children, your girlfriend or boyfriend, the elderly, young people, etc. Multifunctional hot water bottle: Hot is made of thermoplastic material, odorless and recyclable. It lasts longer than the traditional hot water bag with lid, and can also be used as an ice pack or cold water bottle. Make sure this fits by entering your model number.