This sleeveless core-heater hugs the body with efficient Coreloft insulation to preserve warmth while smooth faced, air permeable, fleece stretch side panels increase ventilation. A wind and moisture resistant outer shell extends stand-alone usability. Functions as an outer layer or as a midlayer depending on the conditions. Trim Fit, hip length. DWR finish repels moisture. Mid height collar is insulated and layers well. No Slip Zip main opening, zippered hand pockets, internal zippered chest pocket. 100% nylon exterior shell, 100% polyester side panel, Coreloft insulation.