Jockey Men's Underwear Staycool Seamfree Trunk - 2 Pack 89% nylon/11% spandex. Machine wash and dry. Imported. Style 8843 stay comfortable all day in staycool seamfree trunk features a full mesh back for breathability and no-fly pouch for support seamfree product with staycool technology regulates your skin temperature men's underwear offers a tag free design for comfort