mankind apparently cannot fly, but it doesn't mean we cannot walk on air. some of us already walked on water, so they tell...now we aim higher. with Nike's help and their shox suspension system the user's heels are stepping on 4 or more air-pressurized pillars (act as air pistons), which are part of the rear shoe sole. the air inside the sole's pillars is suppose to absorb the impact of the heel touching the floor surface while walking or running. the heel, which feels most of the body mass, if not separated from the floor with the right absorbing material - the impact grows (when using hard material soles). impact and an uneven terrain surface no longer form a threat on runners for twisted ankles and falls. The bottom of the shoe adjust itself, just like any jeep wheel suspenders, to the surface, leaving the body leveled and balanced. Nike use this system to address another issue besides the physical care of our back problems. psychologically the user feels like flying, he/she walks on air, separated from others, who actually "touch the ground", nike's users are literally hover above all danger. the sole actually react and adjust to different obstacles on the surface by diverting air inside the pillars from side to side, keeping the user foot straight and out of danger. the material nike uses is the cheapest there is (so far...) - Air. But what if we can improve the shox system and actually treat it like we treat our jeep tires, and adjust the pressure before every use in different terrain for the perfect results. if the pressure slowly goes down, what if we could add more air in a very simple way?.... perhaps have a pressure gauge and a pressure re-fill hole that we can re-fill at any local gas station...or have suction holes, on the side of the shoe sole, that suck air into the sole every time the pressure drops / the terrain changes / user's weight changes, etc.