All sizes are displayed in standard US sizing, for more info click on our size guide. WB-1 is FXDs most supportive style with a taller de-bossed microfiber collar, medial zip entry, breathable upper, lightweight composite safety toe, and lightweight NITROLITE midsole cushioning. Materials - Nubuck, Microfiber, Urethane, Mesh, TPU, Rubber Features - 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 reinforced 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 Achilles support insert - Coolmax engineered lining is moisture wicking and accelerates drying - Moulded upper eyelets for once-only lacing - Moulded TPU grip tab on tongue All sizes are displayed in standard Mens US sizing, for more info click on our size guide.