My family member purchased this, but it's being listed because the size didn't fit. It has only been tried on. Below is the product description from the website. ○A popular item from Atelier de L'Or. Simply wear it while you sleep. Gently tightens while you sleep, supporting circulation that tends to stagnate. ○A comfortable, soft tightening sensation that doesn't bother you even when worn all night. Also recommended for relaxing during the day. The fabric with silk protein processing is smooth yet moist. It's also recommended for skin care. ○It's useful for preventing cold in the summer due to air conditioning and for warmth in the winter, so it's recommended for those concerned about cold arms. (You can wear it around your ankles as leg warmers, or around your wrists as arm warmers.) ○It's about 8/10ths of a full length, reaching below the elbow, providing compression support without obstructing flow.