Liberator sex ramps, for example, are made of high density polyurethane foam to support your body without the unpleasant sensation of sinking into the furniture. These ramps also come with a machine washable, 100% nylon cover to make clean up simple. Most ramps are equipped with a microfiber cover designed to keep you from slipping and come in various sizes to accommodate all body sizes.
A sex ramp can be used just about anywhere including the floor, the couch, and the bed. They can come in quite handy for rear entry positions since the blocks are designed to elevate and support the body. This takes quite a great deal of strain off your neck, wrists, joints, and knees.