Talk about hybrid vigor. Part shoe, part sock, Nike’s new “Free Flyknit” sneaker combines twin technologies to create a one-two punch of flexibility and stability. The sportswear giant paired the “Flyknit’s” compressive upper with the “Free’s” pliable outsole to deliver a “barefoot-like flexibility…that locks the foot in place,” according to Sean McDowell, creative director of Nike Running. Auxiliary features include a midsole for mid-range cushioning, along with an elasticized cuff that keeps the ankle fit extra-snug. There’s even a green angle: By knitting the upper in a single piece, Nike is able to slash its typical upper waste by roughly 88 percent. Click below the fold to watch the shoe in action.