Efective for healing and prevention

This technology has proven effective for healing and prevention of ischemic ulcers and the positioning and stability needed by wheelchair users, and added comfort for extended sitting times. The inventor, Robert H. Graebe, chose to use air as the fluid instead of water because of the weight and potential problems water could cause. Water is affected by gravity, difficult to adjust, hard to regulate by temperature, and requires lengthy set-up and take down times. Foams and gels don't posses all of the same properties as air and thus are inadequate at providing appropriate pressure distribution without tissue deformation. Foams compress with time, becoming virtually useless, and gels tend to be heavy, coagulate with time, and become softer when hot and harder when cold, due to changes in density from temperature exposure.

LTV :

LTV General Purpose Seat Cushions Shape Fitting cushions for office, auto, trucks, tractors, bleachers, stadium seats, and more! Comfort Adjustable interconnected air-filled cells redistribute your body weight to minimize pressure. The padded cover adds an extra level of comfort. Proven Medical Technology Using the same world renowned technology that helps wheelchair users sit for longer periods of time without pain and numbness, we've created a cushion that will help you find comfort while sitting on a plane, driving, sitting in an office chair, or on a mobility scooter. Take it anywhere! Lightweight design and air valve make it easy to fold and carry your LTV seat cushion from car to office to stadium seats to plane - anywhere your busy life takes you! Adjust it how you want it An easily accessible valve allows you to adjust the air level to one that feels best for you. Designer Covers Choose from two Ultraleather covers and a wool model, whichever best coordinates with your personal style. This is the last car seat, bleacher seat, plane seat, or office chair seat you will ever own.

Space Age Cushions

The single most important thing a seat cushion does is to conform to the shape of your body to spread the load. Need proof? NASA makes seat cushions and backrests that are custom fitted to each of its astronauts to spread the load out when they need to withstand all those Gs during takeoff. The Airhawk system, like NASA's cushions, precisely adapts itself to every driver's shape. The Airhawk is an overlay you install on top of your present seat cushion. The Airhawk makes the Airhawk likens the function of the cushion overlay to floating on water. Actually, you are floating on a thin cushion of air, stored in interconnected airtight cells. When you first sit, you use a small pump to charge the tightly sealed cells, formed in non-hardening neoprene, with just the right amount of air pressure; then you close the cushion's primary valve to hold that basic shape. This will allow the air in the cells to shift away from the areas of your body that put the greatest amount of downward pressure on the cells below them, evening out the pressure. You end up sitting on a very shallow cushion of air that conforms perfectly to your shape, thus spreading the weight out well beyond the areas where it normally concentrates. By spreading the support over a much larger area, the device allows blood to flow much more freely, removing waste products from the muscles and combating fatigue. A second valve divides the cushion into four separate quadrants to hold the cushion's exact contours even more effectively and guarantee continuous, form-fitting support. The device includes the small, hand-operated pump, plus a special valve system.