Harness the Revolution harness from Nasstoys. Couple friendly, easy to adjust. For men or women. Stylish and comfortable. 2 rings, 2 sizes. Fits many dongs. Compatible with all Nasstoys â Whoppersâ and â Lifelikesâ . Materials: Harness - 100% PVC. Size: Ring Diameters - 2.125 & 2.5, Adjustable Harness - 7.0" X 5.0", Fits up to a 60" waist.