Just peel Polo Stays off their liner and stick them to the underside of your collar.Polo Stays also work on shirts without collar stay pockets! Polo Stays must be heat activated with an iron, to set the adhesive. The Stays adhere themselves to your shirts' fabric and have been tested through over 60+ wash-and-dry cycles...without coming off. What happens after 60 wash-and-dry cycles? Polo Stays may lift from the fabric along an edge. All you need to do is reapply heat, to reset the adhesive