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The Doc Johnson Vac-U-Lock Ultra Harness is a strap-on harness built around the Vac-U-Lock plug system, so you snap on any compatible Vac-U-Lock attachment rather than threading a toy through a ring. The waist adjusts from 26 to 53 inches, and the open crotch leaves room for a man's penis to hang below the plug, so it works for women and men. It suits couples who already own Vac-U-Lock toys or want one harness that takes several. Against ring-style harnesses it is quicker to swap toys but locked to one brand's attachments.
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Owners describe a sturdy, easy-to-set-up harness that holds Vac-U-Lock toys firmly and fits a wide range of waists. The main complaints are straps that slip and the lack of padding at the base.
The Doc Johnson Vac-U-Lock Ultra Harness with Plug is a strap-on harness that can be worn by women or men. It has an adjustable waist and an open crotch design for comfort, easy access and non-slip wear.
The opening under the plug attachment is high enough to let a man's penis hang below. It works with Doc Johnson Vac-U-Lock attachments, which are added separately.
