Strap U Siren Universal Strap On Harness with Rear Support from XR Brands. Get your back into it with this fully adjustable, lightweight strap on harness. The wide rear support belt offers comfort and stability, no matter how wild your play gets. The heavy duty hardware is built to last, while the soft lining and flexible nylon straps keep you secure in comfort. There is even a looped elastic strap for holding your remote, for hands free vibrator play! The nickel free metal ring is sized to accept most standard dildo sizes that have balls or a flared base, while the snap in design allows you to swap out your own ring for even more size options. Measurements fits waists up to 70 inches in circumference, ring measures 2 inches inner diameter. Materials PU harness, polypropylene PP straps, elastic, nickel free alloy ring, nickel free iron snaps. Color: Black. Note one size fits most. Please note dildo not included.