??KNITTED PROTECTIVE COVER: The outside of the hot water bottle is a knitted protective cover to p-revent scalding. Rubber material: The hot water bottle is made of rubber material, sealed, leak-proof and safe.     ???FUNCTION: Help relieve dysmenorrhea, muscle pain, backache, cramps. U shape Ergonomic Neck Hot Warm Bag - The perfect addition to for every home!     ???U SHAPE: The hot water bottle has a U shape and is ergonomically designed to fit the neck. Size: About 365 x 315 mm/14.37 x 12.40 inch(L x W)     ??WIDE RANGE OF USES: U Shaped Hot Water Bottle - Not only for neck, but also for warming body parts such as back, stomach, hands, feet, waist and so on.     ??100%Satisfactory Service: We provide 7*24 hours customer service, if you have any questions, we will help you solve it within 24 hours. Making your life easier and more enjoyable is what we are after.