NIKE Mens Metcon 2 Training Shoes Dark Grey/Hyper Turquoise/Black 819899-003 Size 10 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.