Description of The North Face Nuptse Bootie II - Women's Instead of tromping around in your boot liners, or in the boots you’ve been wearing for the past 18 hours on your ascent, give your feet a reprieve in the Nuptse Bootie II. Quite possibly the warmest and most comfortable slip-ons on Earth, these booties are suitable for everyday wear, inside and out, thanks to water-resistant, down-insulated uppers and Ice Pick™ temperature-sensitive rubber pods for traction on the soles. Features: [Bottom] Cushioned compression-molded EVA midsole [Upper] Water-resistant, durable ripstop nylon upper 700 fill synthetic down insulation Abrasion-resistant rand Collar drawcord lace with barrel lock Ice Pick™ temperature-sensitive rubber pods for increased traction Internal ankle-securing elastic Northotic™ footbed