• Nike ZoomX foam returns energy to keep the spring in your step whether your pace is set to light jog or all-out sprint. • The mesh across the foot is reinforced to hold up against foot straps. • The side arc support helps brace your foot for strength-training intervals. • Rubber tread gives you traction on the floor or on the machines. • The side arc support helps brace your foot for strength-training intervals. • Offset: 10 mm