The Salomon XT-4 OG AURORA BOREALIS sneakers are made of printed mesh, inspired by the natural beauty of the northern lights. They feature a SensiFit structure and a one-pull Quicklace lacing system with a pocket to store the lace. The shoe is lined with technical fabric and has a removable OrthoLite® insole. It also includes an Agile Chassis Skeleton insert in the dual-density E Composition: 100% TPU