The XT-6 sneaker originally started as a serious trail and ultra-running shoe. It desc***s from Salomon's Advanced Skin and S-Lab line, which was used in long-distance racing. The Expanse, on the other hand, is the lifestyle-oriented version. It keeps the trail features (chassis, lugged outsoles, sensi FIT™) but uses a more textured, retro-looking upper with a muted colour palette. Mainly for everyday wear and light outdoor use, not for racing or technical running. Synthetic & Textile Upper Anti-Debris Mesh agile CHASSIS Moulded Ortho Lite® Sockliner Mud conta GRIP® Outsole ***o Fit™ & sensi FIT™ 10mm Heel Drop Style Code: L49201600