Introducing Doc Johnson's Ultra Harness II. This harness has an adjustable waist up to 53 inches, an open crotch for maximum comfort, easy access, and non-slip action; all designed to give you command and control for your erotic pleasures. This Harness can be used by women or men. The opening under the plug is high enough to allow the man's penis to hang below. Just add your favorite Doc Johnson Vac-U-Lock attachment and you're ready to go! Securely strap on your nylon harness then attach any of a selection of dildos. Purchased separately. Features: Vac-U-Lock Vinyl Harness, Vac-U-Lock Plug, PVC, Non-Phthalate. Waist sizes 26 inches to 53 inches. Vac-U-Lock is a US patented harness attachment system. It was the first of its kind 20 years ago when it was developed and still continues to be the strongest brand name in harness systems today. With countless attachments, plugs and full harness systems, Vac-U-Lock is an all-encompassing modular sex system that gives the user the ability to pair different attachments with different harnesses and Vac-U-Lock plugs to create infinite possibilities. Vac-U-Lock Modular Sex System Accessory from Doc Johnson Novelties the Great American Toy Company. Please note the packaging has changed on the Vac-U-Lock Sex System. New image added May 22, 2013.