FXD Workwear Nitrolite Mid Cut Women's Work Boot (WB2W)NITROLITE WORK BOOTS ARE MID CUT COMPOSITE SAFETY TOE WORK BOOTS WITH 10 GAUGE HEAVY DUTY YKK COIL ZIPPERS FOR EASY ENTRY AND SAFE EMERGENCY REMOVAL. FXD WB. 2 NITROLITE WORK BOOTS ARE AUSTRALIA AND NEW ZEALAND SAFETY STANDARD COMPLIANT AND THE BONDING AND COMPOSITE TOE HAVE BE TESTED AND CERTIFIED BY BENCHMARK PRODUCT CERIFICATION. Upper materials are nubuck, microfiber, urethane mesh, TPU NITROLITE midsole cushioning NITROLITE Proprietary Phylon