Made from an innovative stretch loop terry fabric that offers moisture-wicking, quick-dry, UPF 50+ sun protection and easy-care. Pair yours with a Peter Millar performance sport shirt and remain cool and comfortable on the course. 89% microfiber polyester / 11% spandex. Classic fit. Stretch French terry. Peter Millar logo on back yoke. Machine wash cold with like colors; tumble dry low.