XT-4 OG Sneakers, White White Lunar Rock br / • Agile Chassis™ Skeleton, working in synergy with the EnergyCell midsole, the ACS provides stability and shock absorption. br / • Upper Material: Abrasion-resistant TPU material. br / • Outsole: Mud Contagrip® rubber for maximum traction on unstable or rough surfaces br / • Lining: soft and breathable for maximum comfort. br / • Lacing system: Quicklace™ br / • OrthoLite® molded insole for exceptional cushioning, breathability and durability br / .