There are a variety different hollow strap on dildos out there, however, DearLadyBlogger lists specific strap on dildos that we can be happy with. There is a 7 inch g spot dildo that has v shaped straps that go under the crevasse of the butt and come around the back of the butt to feel complete control over your sexual desires for your partner. The straps are made of a strong enough material that allow the strap to remain strong for a long period of time. The straps within the strap on dildo are colored red or black. There is also an o ring in the middle of the strap to insert the dildo through. The o ring in the middle usually is made of steel or hard rubber for best durability use. The strap on dildo allows the best comfort and control during the ecstasy encounters with your partner so the sexual experience will create the effect that anyone would enjoy in the bedroom.