The North Face Women's Nuptse Bootie II Insulated Boots are engineered for the perfect fit on a woman’s foot, quite possibly the warmest and most comfortable slip-on bootie on the planet, this 700 fill down insulated bootie is burly to withstand winter romps at Everest Base Camp, and anywhere else. Ice Pick™ temperature-sensitive rubber pods on sole work to stiffen when temperature drops, providing secure footing with each dropping degree. Suitable for everyday wear on winter walks, with IcePick™ traction, down fill, and tough fabric made from recycled bottles.