Polyester fiber is used as cushioning and insulating material in pillows, comforters and upholstery padding. Upholstery layers cover the mattress and provide cushioning and comfort. This height includes any cushioning or padding. Shipping envelopes can have padding to provide stiffness and some degree of cushioning. Padding is also added to clothing for insulation or cushioning reasons. The most common method is cushioning the harness with foam and mesh. Adequate stiffness is necessary to support the rider, while softness is desirable for cushioning. They covered pads cushioning the impact of walking. Between their vertebrae, they have elastic discs, useful for cushioning the jump landings. The use of '360' of air cushioning is meant to ensure the shoe's longevity. The Vibram FiveFingers has separate slots for each toe and no cushioning. Uses include cushioning applications, and impact absorption applications including packaging. Pneumatic tires are superior in providing effective cushioning while keeping rolling resistance very low. The fluid in the cavity provides lubrication and cushioning. It can also used to provide cushioning or elasticity.