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 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. SX Advanced Harness fits up to a 52 inch waistline.