The Nike Free 4.0 Men's Running Shoe is more flexible than the Nike Free Run 3 and more supportive than the Nike Free 3.0. Like those styles, it combines the feel of barefoot running with cushioning, traction and underfoot protection. The Nike Free 4.0 has a stretchy mesh inner sleeve for a sock-like fit that hugs the foot, yet still allows for easy on and off. The inner sleeve is covered by a seamless upper with a laser-perforated design for a supportive, skin-like fit that moves with each stride. The low-profile Phylite midsole provides a resilient ride and is durable enough to double as an outsole, dramatically reducing the shoe's weight. The Nike Free 4.0 also features a minimalistic, molded sockliner that mimics the curves of the foot for enhanced comfort, fit and support. Features: Deep flex grooves for a more natural stride Asymmetrical lacing system to reduce pressure for enhanced comfort Seamless upper for lightweight support where you need it Reflective Swoosh design trademark for enhanced visibility in low light Solid rubber pods under the medial toe for durability and traction Waffle outsole for traction, durability and a more neutral, efficient toe-off Specifications: 8.2 ounces (men's size 10)The Nike Free 4.0 Men's Running Shoe is more flexible than the Nike Free Run 3 and more supportive than the Nike Free 3.0. Like those styles, it combines the feel of barefoot running with cushioning, traction and underfoot protection. The Nike Free 4.0 has a stretchy mesh inner sleeve for a sock-like fit that hugs the foot, yet still allows for easy on and off. The inner sleeve is covered by a seamless upper with a laser-perforated design for a supportive, skin-like fit that moves with each stride. The low-profile Phylite midsole provides a resilient ride and is durable enough to double as an outsole, dramatically reducing the shoe's weight. The Nike Free 4.0 also features a minimalistic, molded sockliner that mimics the curves of the foot for enhanced comfort, fit and support. Features: Deep flex grooves for a more natural stride Asymmetrical lacing system to reduce pressure for enhanced comfort Seamless upper for lightweight support where you need it Reflective Swoosh design trademark for enhanced visibility in low light Solid rubber pods under the medial toe for durability and traction Waffle outsole for traction, durability and a more neutral, efficient toe-off Specifications: 8.2 ounces (men's size 10)XX