Attach one of the RealRock vibrating or non-vibrating dong to this boxer with harness to penetrate deeply into your partners body. The boxer with harness is made for every dong up to 50 mm. The straps are adjustable and make sure the attached cock will stay in place. Specifications: - Elastic straps fits size: S to XL / Usa Size: 6 to 12 / Uk Size: 10 to 16. Compatible with every dong up to 2 inch diameter. Boxer is made from 82% polyester, 18% spandex for that comfortable but tight Fit. Does not include dildo.