Product Description from Xero website When the weather turns cold, but you still want the comfort, benefits, and sheer fun of barefoot-inspired, natural movement, the Mika is for you. This stylish minimalist boot has 3 cold-weather foes: Water-repellant canvas Cozy interior lining A heat-reflecting warming insole And at only 12.3 ounces each for a women’s 7, you might stroll your way through the entire winter and forget you even have them on. The other reasons you’ll love the Mika are its true Xero Shoes heritage: A wide toe box — lets your toes spread, splay and move naturally Low-to-the-ground design for balance and agility Non-elevated, “zero-drop” heel for proper posture The flexible sole lets your feet bend and move the way they’re supposed to High-traction FeelTrue® rubber sole with dual-chevron tread for traction, backed by our 5,000 mile sole warranty Lightweight construction for “barely there” comfort Tackle the cold in style in your new Mika and Live Life Feet First! The website says to size up by half a size and they are right! This fits more like a 7/37