Slim Feather Upper Arm Compression Inner Authentic product purchased from the official website. Brand new, unused, and unopened. Color: Black Size: M Sleeve Length: 24-30 cm Shoulder Width: 36-43 cm Size: L Sleeve Length: 26-32 cm Shoulder Width: 39-46 cm Size: LL Sleeve Length: 28-34 cm Shoulder Width: 42-49 cm Style up with this upper arm compression inner, proven to have calorie-burning effects! 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 warmth. A popular product, talked about on YouTube, TikTok, Instagram, etc. Recommended for those who want to correct rounded shoulders and posture, and for those who want to easily shape up just by wearing it. Instant purchase OK☆