It's layer two in Harley's 1-2-3 modular line that gives you interchangeable protection and style options for riding. Or this can also be worn alone. Made with 100mg polyfill for lightweight warmth. Pre-curved sleeves. Hybrid build with fleece underarms and side panels. Made from 100% nylon (body). 91.5% polyester, 8.5% spandex fleece (side panels and underarms). 100% nylon lining. Two-way zipper front. Zippered hand-warmer pockets with a packable pocket bag included. 3M Scotchlite Reflective Material. Allover quilted styling. Rib-knit collar.