Water Resistant Full-Grain Leather upper Kevlar stitching on recycled pre-consumer TPU toe bump Cordura collar for strength and durability Additional under foot Phylon Interlayer Cosmo Lunar lining with ultra foam and antimicrobial tech Minimal internal seams providing maximum comfort High density EVA ankle padding for added comfort and protection PU/Memory foam footbed with Agion antimicrobial tech Rubber Outsole, PU Midsole 10 Gauge YKK non-metallic zip 100% airport friendly Certified to AS 2210.3:2019 EH tested to ASTM F2413-11 (American Standard)