Originally launched in 2013, the XT-6 is the preferred footwear for world-class athletes running ultra-distance races in harsh conditions. It now returns with updated colors and materials. Technology - Quick lacing system Upper - Synthetics - unlike textile, synthetic fibers are stronger, more durable and quick-drying. Midsole Polyurethane foam - is one of the best thermal insulators, is lightweight, tough and windproof. Agile Chassis System (ACS) Sole Contagrip® - Salomon takes pride in making their sneakers as reliable as possible, no matter the weather or surface. Adaptability to any conditions is provided by the Contagrip Outsole, which is a sole that stands on a carefully balanced mix of density, compounds and geometry. Rubber - a material that is very easy to maintain and you will appreciate it especially in rainy weather.