SUPPORT MEETS ULTRALIGHT FLEXIBILITY The Nike Free Trainer 5.0 Men's Training Shoe provides locked-down support while allowing your foot to move naturally to help you meet the demands of intense multi-sport workouts. Increased Agility Outsole flex grooves create six points of flexibility, allowing your foot to move naturally in every direction. Lightweight Stability Flywire cables integrate with the laces for an adaptive, supportive fit that doesn't weigh your foot down. Lateral Support The strong, lightweight woven mesh upper offers plenty of side-to-side support for quick movements and hard lateral cuts. More Benefits: • Waffle pistons on the outsole absorb impact and add responsiveness • Rounded heel fits the shape of your foot and rolls with the ground for a more natural footstrike • Abrasion-resistant rubber on the heel and toe add extra durability 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.