WB.1 is FXD’s most supportive style with a taller debossed microfiber collar, medial zip entry, breathable upper, lightweight composite safety toe, and lightweight NITROLITE midsole cushioning. Upper material: Nubuck/Microfiber/Urethane Mesh/TPU NITROLITE Proprietary Phylon midsole cushioning material Slip, oil, and heat resistant 62 durometer rubber outsole High density 67 durometer green heel insert Poron midsole insert for additional heel cushioning Ventilated, antimicrobial PU footbed, sculpted for correct arch support Outsole side abrasion panel Lightweight composite safety toe Bump Cap with an extra 1.5mm TPU in the heavy wear area for increased durability Ballistic high abrasion resistant thread on all stitching Breathable TPU mesh panel with water resistant membrane. Power strap to 'lock down' heel for increased comfort and reduced fatigue Silicone re-inforced padding for impact protection Protective TPU heel kick panel YKK 10 gauge coil zip angled for easy entry and smooth movement Coated microfibre collar with ventilation for support and breathability Moulded TPU powerstrap eyestay for durability Nylon heel tab Padded achillies support insert Coolmax engineered lining is moisture wicking and accelerates drying Moulded upper eyelets for once-only lacing Moulded TPU grip tab on tongue