Material: 85% nylon, 15% spandex Sizing Tip:This item follows a slim-fit sizing standard. For a more relaxed or true-to-size fit, we suggest choosing one size up from your usual. For example, if you typically wear a US size 30, a size 31 or 32 may offer a better fit. Warm tips: All are measured manually in a flat-laid position, with an allowable error of some 1-3cm. All dimensions are subject to the actual object. Unit: cm