The Supreme Harness is built for comfort and rigorous play. Easily adjustable up to 69 in., with pull-to-tighten straps, open crotch and rear, and a snap front for swapping out attachments. Made of smooth black neoprene, the 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.