The Terra Firma harness design revolutionized strap-on sex with its breakthrough functionality that holds your dildo firmly in place by simply pulling the straps tightly around your waist and thighs. Enjoy total control of every thrust that will transform anyone into a Don Juan, even if you're a Donna. The Terra Firma Harness comes with 3 O rings for maximum dildo versatility. It fits 32? to 42? hips.