Salomon's XT-6 Expanse is a model considered by many to be one of the best Ultra Trail shoes. Its "Expanse" version abandons traditional welded TPU overlays to make way for a multi-layer construction, giving the model a slightly more retro and less high-tech look. Mesh, synthetic leather upper. Wavy lacing system. Foam midsole equipped with Agile Chassis System technology for superior cushioning and support. Reflective details on stitched heel loop. Soft OrthoLite insole for added comfort. Contagrip outsole for maximum traction on all types of surfaces.