Nike Air Max 90 SneakerBoot NSNike transforms the legendary Air Max 90 running sneaker into a trail-ready boot with this "SneakerBoot" version. They feature a mid-cut design with a No-Sew (NS) upper, neoprene bootie, pull tabs on the heel and tongue, visible Air-Sole unit, and a rubber outsole with enhanced traction for the unbeaten path.