NIKE Mens Metcon 2 Training Shoes Racer Blue/Vivid Orange/Black 819899-480 Size 11.5 synthetic-and-mesh Flywire technology provides a locked-down fit. Abrasion-resistant film helps protect against high-heat friction. Low-profile TPU heel clip helps minimize drag during wall exercises. Abrasion-resistant film wraps the midfoot for durability during friction. Sticky rubber in the forefoot offers excellent traction.