The Nike Free Run+ 2: Barefoot-like feel, shoe-like benefits. Taking a cue from the intricate workings of the bare foot, the Nike Free Run+ 2 Men's Running Shoe is designed to maximize the foot's natural range of motion while providing protection and cushioning for a smooth ride. Benefits: The flexibility of Free plus cushioning and support. Numerous flex grooves for a more natural, barefoot-like strideDynamic upper for a perfect glove-like fit. Fit: Designed to keep the foot in place without restricting movement, the Nike Free Run+ 2 features bonded overlays for excellent support. The inner sleeve provides a snug feel, yet it's dynamic enough to move with the natural motion of the foot. Flexibility: Deep flex grooves along the outsole allow the foot to move naturally in multiple directions. The heel features a center of pressure design that provides additional cushioning on contact, maximizing overall flexibility. Cushioning: Without sacrificing the feel of barefoot running, the Nike Free Run+ 2 Shoe delivers a plush, cushioned ride. Phylite material seamlessly fuses the midsole with the outsole, creating a one-piece design that's as resilient as it is durable. The molded sockliner mimics the curves of the foot for a comfortable, supportive fit. Origins: After 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, just like 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. Additional Details: Asymmetrical lacing system to help reduce pressure over the top ridge of the foot. Waffle lugs at the outsole for impact absorption and traction. Nike+ ready.