LIGHTWEIGHT FLEX WITH MAXIMUM BREATHABILITY The Nike SB Free Men's Skateboarding Shoe combines a lightweight mesh upper with the natural flexibility of Nike Free technology and the durable performance of a board shoe for the ultimate in comfort and control.Lightweight Breathability The upper is made of comfortable suede and mesh panels that allow ventilation to keep your feet cool and dry.Board Grip and Balance The skate-specific sole has Nike Free flex grooves for a comfortable, natural feel and better board grip and balance. Rubber outsole pods provide extra traction and control.More Benefits Reflective elements help keep you visible in low lightHerringbone pattern on the outsole for traction in all directionsPhylon foam under the heel for lightweight cushioning Padded tongue for comfortNike Free OriginsAfter learning that Stanford athletes had been training barefoot on the university’s golf course, three of Nike’s most innovative and creative employees set out to develop a shoe that felt natural and weightless, similar to bare feet. In 2002, they examined a group of men and women with pressure-measuring insoles taped to their feet, using high-speed cameras to capture images of each foot in motion. The team spent eight years studying the biomechanics of shoeless running. The results yielded a profound understanding of the foot’s natural landing angle, pressure and toe position, allowing Nike designers to build an unconventional and flexible running shoe from the inside out.