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