The Keen Gypsum is your all-terrain trail shoe designed & built to get you there! It has a mixed fabric, nubuck and textile upper, lined with the Keens proprietor Keen. Dry waterproof breathable membrane for excellent waterproofness & breathability. For enhanced moisture management around the opening of the boot the area has been lined with Dri-Lex. Dri-lex is a combination on Hydrophobic (moisture hating) polyester & Hydrophilic (moisture loving) nylon. This combination of yarn types provides awesome wicking capabilities, as one sucks moisture up & the other pushes it away. Its dual density, compression-moulded EVA midsole topped the Keen. Zorb strobel means this boot is pretty damn good at absorbing shock form your heel strike. Making walking easier on the old joints. The outer sole is made from a dense, durable non marking rubber. The heel cup is reinforced by is TPU heel stabiliser and the sole in stiffened with the use of a Torsion stability ESS shank, so its pretty stiff for a lightweight boot. 4mm multi-directional lugs Dri-lex moisture control collar Dual density compression-molded EVA midsole KEEN.DRY ® waterproof breathable membrane KEEN. Zorb strobel Non-marking rubber outsole Removable metatomical dual density EVA footbed Torsion stability ESS shank TPU heel stabilizer Waterproof nubuck leather upper