From The North Face, the Women's THERMOBALL Traction V Mules feature: Lightweight and packable for easy transportation 100% recycled P.E.T. ripstop upper with a non-PFC durable water-repellent (non-PFC DWR) finish for added water repellency Slip on design Collapsible heel with elastic side panels for easy on-and-off Oso fleece collar lining for added comfort THERMOBALL™ 100% recycled polyester insulation helps keep feet warm even when wet Rubber outsole made with 20% recycled material Approx. 7.1 oz./201g weight per pair Imported.