Sport Nubuck/Mesh - PU footbed - Nylon Mesh + NXT footbed cover - Revive Tech: Engineered Comfort midsole - Nylon shank - Strobel construction - Extreme slip resistant compound maximizes grip and traction - Composite Safety Toes are rated ASTM F2413-11 and are nonmetallic - and undetectable in electronic security environments - Metallic styles exceed ASTM standards for safety but are entirely free - of metal - Slip Resistant soles reduces the risk of slips and falls