Unity double penetration strap onWith the Unity Harness System, you can give your partner the ultimate double penetration experience. The dual ring design allows you to use your imagination as to what accessories to use. The straps snap onto the double ring to hold it in place. Comes with two sets of O rings, metal for weight and rigidity, or silicone for a little bit of stretch and give. The comfortable and fully adjustable nylon harness easily fits up to a 60 inch waist