Specification: Liner material: rubber Outer material: kintted Single head product size: 365*315MM  (Due to the manual measurement, there will be an error of 1-3 cm.) Feature: 1.Hot water bottle for neck and shoulders – This super soft, curved hot water bottle is perfect for heating you, helping you reduce stress and relieve soreness around your neck and shoulders. 2.Relieve pain and relax muscles – just place the kettle on your shoulders to provide lasting, soothing heat to relieve any tension – then sit back and relax. 3.Soft knitted cover – The hot water bottle has a super soft cover that can be machine washed. It has 2 different styles to choose from-one single head and one double head 4.Relieve headaches-hot water bottles can also relieve headaches caused by stress and help you restore calm and tranquility. 5.Using high-quality materials, long service life Package Including: Hot water bottle*1 knitted cover*1