NIKE Lunarglide+ 5 Men's Running Shoes mesh Evolved Flywire technology hugs the entire length of foot with customizable lightweight support. Heel clip engages upon footstrike for snug fit and support Lunarlon cushioning system with a "bottomless" carrier construction and the Dynamic Support platform provide support and plush cushioning Natural-motion-engineered flex grooves promote an efficient stride. BRS 1000 at heel. Environmentally preferred rubber everywhere else