We know folks who wear one non-stop from October until May. A windproof barrier laminated to high loft pile makes a jacket that will go anywherealone, or as a midlayer. Freedom-granting Y-Joint sleeves, two zippered hand warmer pockets and a wind flap under the zipper. Made in USA. FABRIC: Polyester 1/4\\" pile (75% PCR, 25% virgin) and Capilene-treated brushed mesh composite with P.E.F. (performance enhancing film) barrier.