The Supreme Harness is built for comfort and rigorous play. It provides sexy support and is easily adjustable up to 60 inches. 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.