The quality is excellent - like a pair of tennis shoes! skeletoes rave is stability when standing on all four points of the foot and better structural alignment. They help me a lot to take care of my body and it makes me feel great. I wear all day and it's like clouds on my feet. I had another model and they are excellent! So comfortable. But be aware that those shoes will stink of sweat - stock up on some Tenactin-potent actin every night to combat that odor! Laugh!