Details: The Nike Free Hyperfeel TR Training Shoes Volt/Photo Blue/Black are made for high intensity training and delivers both incredible ground feel and plush cushioning that conforms to your feet.REVOLUTIONARY SENSATION AND CUSHIONING FOR HIGH-INTENSITY TRAININGFlexible CushioningThe highly flexible drop-in midsole offers the natural-motion benefits of Nike Free with the soft, responsive cushioning of Lunarlon. It features deep flex grooves that allow your foot to move freely, while still providing plush, resilient impact protection.Lightweight SupportThe one-piece, ultra-lightweight Flyknit upper features highly elastic threads that help lock your foot down during multi-directional movements and provide a contoured, supportive fit that moves with you.Low-Profile TractionThe minimal outsole has an ultra-low profile for enhanced ground feel and durable traction on a variety of surfaces so you can move lighter and faster.More Benefits Pull tab on the heel for easy on and off Cushlon heel clip for support and stability Rounded heel for more natural range of motionNike 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.Flyknit OriginsNike Flyknit technology was inspired by feedback from runners seeking a shoe with the snug (and virtually unnoticed) fit of a sock. Nike embarked on a four-year mission with teams of programmers, engineers and designers to create the technology needed to make the knit upper with static properties for structure and durability. Then the precise placement of support, flexibility and breathability—all in one layer—was refined. The result is a featherweight, formfitting and virtually seamless upper....The Nike Shoes more colors

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