The Doc Johnson Supreme Harness is built for comfort and rigorous play. It provides sexy support and is easily adjustable up to 69â  , with pull-to-tighten straps, open crotch and rear, and a snap front for swapping out attachments. Made of smooth black neoprene, the Supreme harness works with all Vac-U-Lock attachments as well as strap-on compatible toys. Includes two O-rings. Designed for use by women and men. Washable. Made of neoprene.