NIKE Free Trainer 3.0 Mid Mens 615994-001 Synthetic DYNAMIC FIT CONSTRUCTION WITH WEATHER ENHANCED PROTECTIVE ELEMENTS LOW-PROFILE PHYLON MIDSOLE FOR LIGHTWEIGHT, RESPONSIVE CUSHIONING. SIDEWALL WRAP-UP DESIGN CRADLES THE HEEL AND THE MIDFOOT DELTA NODES TRACTION PATTERN PROVIDES ULTIMATE GRIP ON MULTIPLE SURFACES. DIAMOND FLEX DESIGN AID MULTI-DIRECTIONAL MOVEMENT