FabricImportedRubber sole? GRAPHENE OUTSOLE – Using revolutionary graphene enhanced rubber to deliver the world??s toughest grip on rougher surfaces; the G290 is made to perform inside of the box.? HEEL LOCKDOWN – The external heel cage paired with the memory foam lining inside of the ankle collar, fit your achilles preventing any slippage whilst providing the ultimate heel lockdown during powerful lifting movements.? FLEXIBLE DESIGN – The outsole technology in the sole of the shoe ensures the foot has the flexibility and freedom to move naturally for the most powerful movements.? MULTI PROTECTION – The technology on the shoes upper delivers traction and durability on rope climbs, an enhanced toe bumper and specifically designed heel slider provides protection whilst decreasing wall drag on hand stand push ups.? SIZE NOTE – The shoes come up a 4 on our fit scale (1 narrow – 5 wide).