This is "Slim Arms Change," a supporter designed to help you achieve slim upper arms. It is a Made in Japan M-L size, compatible with upper arm circumference of 26-32cm and shoulder width of 39-46cm. The material is 90% nylon and 10% polyurethane, providing elasticity and a snug fit. This item is unused, but please refrain from purchasing if you are sensitive about items stored at home. [Size] M-L (Arm circumference 39-46cm) [Upper Arm] 26-32cm [Shoulder Width] 39-46cm [Material] 90% Nylon, 10% Polyurethane [Item Condition] Unused [Color] Black Thank you for looking. Immediate purchase OK