A hot water bladder is a healthy and effective way to provide full body comfort. Whether you're standing, driving, or walking around, you can wrap it around your body with the harness to provide warmth. . The bladders are made of natural rubber that retains heat for a very long time. The belt is made of soft and comfortable fabric with pockets to warm hands. The hot water bottle can be used for arthritis, sports injuries, back or waist. A great gift for women, and a good way to treat menstrual pain. Also can be used as an ice bag function: Fill it with cold water and then put it in the fridge, you will get an ice bag. The silicone water bag can be used as a cold massager for aches, sports injuries, fever, and reduce swelling.