Nike Air Max 97 Ultra '17 Women's Shoe The Nike Air Max 97 Ultra 17 features a removable insole that offers additional cushioning to the foot. The Air unit is a patented cushioning technology by Nike which was conceptualized by aeronautic engineer Franklyn Rudy in the 1970s. It is made up of a shock-absorbing bag filled with compressed gasses similar to the blow rubber molding technique used by NASA in creating space helmets at that time. Built with a single-piece textured jacquard upper that makes this edition lightweight and air permeable. The pressure-volume in the Air bubble unit was regulated, the forefoot grooves plus other regions of the sole were cored out to keep this version ultra-lightweight as compared to its predecessors. - Size: M - Color: Black / White