With the North Face Thermoball™ Roll-Down Bootie, cold temperatures no longer mean cold feet. Made from 100% recycled P.E.T. ripstop shaft upper, this women’s slip-on boot is the most stylish way to keep your feet toasty and comfortable. The ThermoBall™ insulation technology provides warmth equivalent to 600-fill down and is also water-resistant. Wear the North Face Thermoball™ Roll-Down Bootie on all your cold weather exploits for the best warm, comfortable performance. Adjustable fold-down collarBottom: Cushioned, lightweight, injection-molded EVA outsoleIcePick® temperature-sensitive lugsInset TNF™ Winter Grip® rubber center podSynthetic mudguardThermoBall™ insulationUpper: 100% recycled P.E.T. ripstop shaftWater-resistant, element-sheddingStyle Number: CM88FG9View All The North Face ProductsCustomer Reviews for Women's The North Face Thermoball™ Roll-Down Bootie