Like an insulated puffer coat for your waist. Merino wool on the inside. On the thinner side, so I've found it good for above 20(F) degrees weather. Good condition, lightly worn. - Performance skirt designed for activities in any conditions - Wool insulation provides sweat management and odor control - Wind-resistant nylon, DWR coating protect from the elements - Full-length, two-way side zipper allows for easy on and off - Hidden pocket in waistband stores on-the-go essentials