Doc Johnson Novelties Vac-U-Lock Panty Harness with Plug Full Back Black S/M. Play your way! This Vac-U-Lock stretch cotton harness is made for comfort in soft, breathable material that is quick and easy to put on and remove. Each harness comes with our patented Vac U Plug in a reinforced front panel, this style can be equipped with any Vac-U-Lock compatible attachment available from Doc Johnson or already in your collection. This is a truly all purpose harness, featuring a 45mm e or approximately 1.77 inches O-Ring and two pockets perfect for holding your favorite bullet vibes or anything else you want to stash, built into a durable full back panty. Every product in the patented Vac-U-Lock system is designed to help you create any strap on or toy you are in the mood for, and it is as simple.as popping on the attachment of your choice. Features: soft, breathable stretch cotton. Reinforced front panel for stability. Two built in pockets to hold your bullet vibes. Fits any Vac-U-Lock compatible attachment. Harness only. Ladies sizes small to medium, S/M. Hips 26 inches to 45 inches