SX For Advanced Harness is an evolution in adjustable strap-on systems. Comprised of 2 strong silicone support rings, theres no need to measure dildos ever again. Fasteners secure the support rings making SX For You Advanced Harness compatible with all dildos, even extreme dildos! Heavy duty constructed strap-on harness is for beginners to advanced players. The performance pad and adjustable straps are constructed from velvety smooth faux leather for comfortable wear. One size fits most. Fits up to 47 inches waistlines. Heavy duty construction. 2 strong elastic support rings included.