Sharkskin is a closely woven worsted wool fabric that uses two tones of yarn in a twill weave. In this case, the a dark chocolate brown thread is woven together with a less prominent black thread to achieve a two-tone dark brown effect. The twill weave gives it a noticeably smooth finish and a high luster, and helps the suit keep its shape for a long time. This particular cloth is a classic four-season 290g/m (8.5oz) Super 110’s from Vitale Barberis Canonico in Italy. This is one of our most used qualities and we have found that it performs exceptionally well.