Description of The North Face NSE Tent Mule - Women's After a demanding trek in wintry conditions, slide your feet into the NSE Tent Mule and treat your feet to well-deserved comfort beneath the 450 fill down insulation. Bring these water-resistant, low-profile mules along on any cold-weather excursion to kick-around the campfire, or to wear inside the refuge of your tent for greater protection in freezing conditions. Features: [Bottom] Highly durable nylon mesh base with rubber fine-mold traction lugs [Upper] Water-resistant, durable ripstop nylon upper 450 fill down insulation Die-cut EVA sockliner with Aegis antimicrobial foot-bed covering