08_Inserting air cushion

Look at the final product of the cutting. See how the air cushion is actually protruding 1" out of the foam padding? This will provide you a proper hamstring support, allow blood flow to maximize during long sitting session.

Also notice how I position the air cushion. The horizontal bladders are going side-to-side. The air valve faces downwards, where the foam will help keep the valve from popping out. Cheap valve made in China.