Acro Shoulder Support, Size: MediumDynamic orthosis allows protected shoulder motion.Provides support for painful, weak, unstable or hypermobile shoulders. Ideal for orthopedic and neurological conditions. Can be worn under clothing. Adjust the three non-stretch straps to restrict shoulder motions such as retraction of the scapula, while limiting rotation and abduction for subluxation conditions. Straps require minimal tightening so the risk of circulatory problems is decreased. Chest strap is padded under the axilla for added comfort. Sleeve opening with grip liner allows better humeral fit and less migration. Soft, padded material balances temperature extremes. Hand or machine wash and air dry. Latex free. Fits either the left or right arm. SizeS: Biceps Circumference 11“ to 12½ “ (28 to 32cm), Arm/Chest Width 18“ to 25“ (46 to 64cm)M: Biceps Circumference 11½ “ to 13¾ “ (32 to 35cm), Arm/Chest Width 18“ to 25“ (46 to 64cm)L: Biceps Circumference 13¾ “ to 15“ (35 to 38cm), Arm/Chest Width 20“ to 27“ (51 to 69cm)XL: Biceps Circumference 15“ to 16½ “ (38 to 42cm), Arm/Chest Width 25“ to 32“ (64 to 81cm) Product photo may not exactly match the product offered for sale. Please refer to the product description.