Features of the KEEN Men's Nxis Speed Shoe KEEN. ALL-TERRAIN rubber with an all-new deep lug pattern for superior traction on any trail Eco Anti-Odor for natural odor control Breathable textile lining Speed-lace webbing system Removable PU insole for long-lasting comfort Vented engineered mesh construction for enhanced breathability Compression-molded EVA Midsole for surprisingly lightweigh Fit and feel ORIGINAL Fit: Our insole KEEN Fit with generous space across your forefoot for toes to spread out. Foot is roomy and comfortable.