Designed to make fast go faster, the Nike Zoom Gravity is built to take you from quick tempo runs to winning races. Snappy forefoot responsiveness and grippy, multi-surface traction combine to optimize your stride. -Zoom Air in the forefoot gives you that propulsive, snappy feeling, while the rubber outsole directly underneath creates a springy sensation like you're popping off the ground. -The midsole is lifted higher to make room for more cushioning inside. Soft foam materials inside a firmer foam construction give you a stable, comfortable ride.