44% nylon, 44% polyester, 12% spandex bonded jersey windproof panels on body. 88% nylon, 12% spandex twill knit sides and undersleeves for less bulk when worn under a jacket. Two-way asymmetrical zipper front. Extended sleeves with thumbholes .Two zipper hand-warmer pockets with media port in left pocket. Stitching detail on seams. Rubber patch on right chest.