The XT-6 from Salomon has a Mud Contagrip®: Built for maximum grip on loose, soft, rugged, and uneven surfaces, Mud Contagrip® uses deep, sharp lugs made from a compound that focuses on adhesion. Agile Chassis™ System: ACS provides stability and dampening and works in concert with the EnergyCell midsole. Single layer mesh: A single layer of Mesh, close to the foot, for maximum feel. Abrasion-resistant TPU material: Durable material that effectively resists environmental factors to limit wear over time.