The shoulder protector has great elasticity, the material is soft and comfortable, and it is lightweight, thin, which can be worn very fit to the body. It is also very convenient to wear out without putting a load on the shoulders.Ergonomically designed and using the principle of hot compress at acupoints, this shoulder warmer can quickly store heat within 30 minutes, which can not only prevent cold and keep warm, but also care for different acupoints, relieve pain and improve shoulder discomfort.It is made of high-quality polyester cotton, yarn and spandex material.There are 4 different suitable shoulder width size for you to choose: S, M, L, XLSuitable for women and men, especially those suffering from shoulder pain, workers, athletes and the elderly.Item Name: Shoulder WarmerMaterial: Polyester Cotton, Yarn, SpandexGender: UnisexUsage: Keep Warm, Pain ReliefFeatures: Windproof, Soft, ComfortableSize Details:XL:  Suitable Shoulder Width: 50-54cm (Approx.)L:  Suitable Shoulder Width: 46-50cm (Approx.)M:  Suitable Shoulder Width: 42-46cm (Approx.)S:  Suitable Shoulder Width: 37-42cm (Approx.)