The fleece lined, high-performance Arctic Sport is 100% waterproof and features double reinforcement at instep, heel and Achilles, and a lightweight EVA molded mid-sole with contoured foot bed for supreme comfort and cushioning. A 2mm thermal underlay adds extra insulation on the inside, while the rugged MS-1 molded outsole and wrap-up toe bumper provide optimal traction, durability and protection on the outside. The stretch-fit top line binding keeps snow out and warmth in, so you tackle any cold weather task with confidence. Unisex sizing, sizes are show in men's size and would be the next size up for women. Size 5 would equal a size 6 for women. Features5mm NEOPRENE bootie Cozy fleece linedCushioned EVA mid-soleRugged MS-1 molded outsoleComfortable top line keeps snow outTemperature Range: -40 to 40F