Nike Mens Free Trainer 5.0 Running Shoes (9, White/Gym Red-Black) Adaptive-fit upper for a glove-like fit with supportive lockdown. Natural motion design for a barefoot feel with resilient cushioning. Aggressive rubber nodes for multi-surface traction. Dynamic Fit construction wraps the forefoot for a glove-like fit that moves as the foot moves for extra support. Solid rubber pods in the heel and perimeter of the forefoot are configured in an aggressive, delta-node pattern for added traction and durability.