SilkWorld Men's Performance Cotton Supporter Strap Pack of 7 X-Small 100% Cotton Because of the Asian size is about 1 size smaller than US size.For example: usually the Asian M is equal to the US S, and our item tag is printed in Asian size only.When you receive the item,please feel ok, it is just your size. Material: 75% Cotton, Note:Please check the Sizing info Before buying! Soft cotton feel,Cool, breathable stretch mesh pouch Wide elastic logo waistband sits flatly and securely Stability anchor on waistband for support and lift