Nike Dunk Low FLEXIBLE AND QUICKThe Nike Free Trainer 3.0 Men's Training Shoe is designed for flexible natural motion and lateral stability. Train and run on multiple surfaces, inside or out. A Flyweave knit upper molds to your foot for a lockdown feel and exceptional comfort, so you can train explosively in every direction.Stability and ResponseA low-profile stance with Flywire cables delivers stability with an ultralight locked-down fit. The Phylite midsole doubles as an outsole, providing responsive cushioning while dramatically reducing overall weight.Lateral Strength and DurabilityA woven mesh and synthetic leather upper wraps your foot for enhanced lateral strength. No-sew overlays in key areas add the durability needed for intense training.Natural MovementSix points of hexagonal flex grooves and a rounded, anatomical heel combine for ultimate flexibility, allowing your foot to move naturally.More DetailsMinimalist tongue lined with a thin foam layer for lightweight comfort under the lacesAbrasion-resistant carbon rubber outsole reinforcements enhance durability in high-wear areasWeight: 8.0 ounces (men's size 10)Nike 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.