For that couple that wants to add strap-on sex to their growing repertoire, this New Cummers Kit gives them everything they need to add this to their session. The harness is made of a firm, yet comfortable nylon/cotton material. It adjusts to fit hips up to 60". The included silicone dildo measures 4.5" in length and .75" in diameter. The O-ring that is attached to this harness is fixed, but will accept other dildos of 1.75" in diameter.