FXD WB.5 DURA900 NITROLITE WORK BOOTS ARE LIGHTWEIGHT, FULLY SYNTHETIC, AND PROVIDE SUPERIOR COMFORT AND DURABILITY. THE WB.5 IS A 6” HIGH-CUT WORK BOOT AND FEATURES A DURABLE FULLY SYNTHETIC DURA900 ADVANCED NYLON BASE UPPER MATERIAL AND OUR PROPRIETARY NITROLITE EVA MIDSOLE FOR ALL-DAY COMFORT AND REDUCED FOOT AND LEG FATIGUE. DURA900 ADVANCED NYLON UPPER NITROLITE MOLDED PHYLON MIDSOLE PORON HEEL INSERT PREVENTS HEEL STRIKE INJURIES AND REDUCES FOOT AND LEG FATIGUE HIGH REBOUND MOLDED, VENTILATED, ANTI-MICROBIAL POLYURETHANE FOOTBED SRA RATED OIL SLIP HEAT RESISTANT TO 300C KPU TRIPLE THICKNESS BUMP CAP COMPOSIT SAFETY TOE KPU EXO SKELETON MUD GUARD AND EYESTAY SYSTEM YKK HEAVY DUTY 10-GUAGE COIL ZIPPER COOLMAX ENGINEERED LINING WICKS MOISTURE AND ACCELERATES DRYING SILICONE EMBOSSED ANKLE GUARD PROTECTIVE MOLDED TPU ANKLE SYSTEM SIZING CHART BOOTS SIZE CHART US Mens US Womens EU UK Japan 5 6 37 4 23 6 7.5 38 5 24 7 8.5 39 6 25 8 9.5 40.5 7 26 9 10.5 42 8 27 9.5 11 42.5 8.5 27.5 10 11.5 43 9 28 10.5 12 44 9.5 28.5 11 12.5 44.5 10 29 11.5 13 45 10.5 29.5 12 13.5 46 11 30 12.5 14 46.5 11.5 30.5 13 14.5 47 12 31 14 15.5 48 13 32