Nike Mens Flex 2013 Running Shoes - Cool Grey/Black/Gym Red

Flexible Support, Outstanding Comfort.
Designed with articulated, full-length flex grooves and lightweight mesh for natural and efficient range of motion plus superb breathability.

• Full inner sleeve construction wraps around the entire foot for a snug, comfortable fit and feel
• Lightweight sandwich mesh and midfoot overlay for breathability and comfort
• Phylite midsole provides a resilient ride and enough durability to double as an outsole
• Phylon core features soft, yet resilient foam for a lightweight, comfortable ride
• Articulated, full-length flex grooves enhance flexibility for smooth, natural and efficient range of motion
• Environmentally preferred rubber and strategically placed segments of solid rubber for enhanced traction and durability in key wear zones