The Men's Nike Free Trainer 3.0 V4 Training Shoe Black/Brigade Blue/Pure Platinum/Blue Lagoon features new circular-knit technology for superior lateral control and a responsive fit. Hexagonal flex grooves let you move naturally.FLEXIBLE AND QUICKBenefitsLow-profile midsole offers stability and responsivenessCircular-knit mesh for lateral strength and a responsive fitHexagonal flex grooves let you move naturallyMesh and synthetic leather upper for breathability and a lightweight feelFlywire technology wraps the arch to provide an ultra-light, locked-down fitPhylite midsole/outsole for durability, a resilient ride and reduced overall weightProduct DetailsWaffle outsole pistons help absorb impact and increase responsiveness5mm offset in Phylite foam for a firm, stable feelAbrasion-resistant BRS 1000 carbon rubber in the heel enhances durabilityAnatomical heel is rounded to roll with the groundNike 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....The Nike Shoes more colors