NSF Conway Zip Denim Jacket in Blue. Size S, XS. 70% recycled cotton 30% viscose. Made in USA. Machine wash. Front zipper closure. Side slant pockets. Button cuffs. Rigid denim. 30017DO224. Based out of California, NSF has caught the eye of many. With their clean design and boyish charm, NSF is recognized for its relaxed, modern style looks.