Full-grain leather with VentTEK mesh panels with 50% recycled polyester lining, Oil- and slip-resisting, abrasion-resistant sole, passes hot contact test at 150C/302F, ATS technology provides ergonomic support on uneven terrain, DRYShield waterproof breathable construction, U-Turn Entry System lets people with high arches easily slip on their boots, VentTEK mesh panels keep you cool, Removable All Day Cushioning insole, FLX Foam midsole has a light springy feel that cushions every step, Lightweight, durable sole made with SMARTLITE material from Huntsman, Electrical hazard rated,