Slim Feather Upper Arm Compression Inner Authentic product purchased from the official website. Brand new, unused, unopened. Color: Black Size: M Sleeve Length: 24-30cm Shoulder Width: 36-43cm Size: L Sleeve Length: 26-32cm Shoulder Width: 39-46cm Size: LL Sleeve Length: 28-34cm Shoulder Width: 42-49cm Style up with this upper arm compression inner that has been proven to increase calorie consumption! The compression support tightens sagging upper arms. In addition to correcting slouching posture, the uneven texture on the back of the fabric provides edema (swelling) care and promotes warmth♪ Recommended for those who want to correct rounded shoulders and posture, and for those who want to easily shape up just by wearing it. No comment needed, instant purchase OK. Thank you very much.