All Sizes are in US Men's Infallibly trail-ready since conception, the XT-4 is fully equipped for all-terrain adventuring. Featuring an impressive checklist of hi-tech engineering and a progressive take on aesthetic expression. Light and durable The lightweight, streamlined construction features a mix of resistant TPU film and mesh designed to last. Grip With the aggressive lug design on our proprietary Contagrip outsole, grip is assured on various and surfaces. Stability The full-length Agile Chassis System (ACS) ensures improved stability, even over longer distances.