• Lightweight fabric and minimal construction allows the vest to be easily packed away. • Full-length front zipper (2 way) to manage ventilation easily. • Partial elastic at the waist and shoulders seal out the cold. • Fabric Content: MAIN: 100% Woven Nylon - OTHER: 90% Polyester, 10% Elastane The perfect apparel for the perfect ride, that's what our Prime Series is all about. The best fabrics, constructions, and technologies go into these pieces, and the Men's Prime Wind Vest is no exception. A fully windproof front fabric is paired with partial elastic at the waist and shoulders and a breathable mesh on the back to keep the chill off of your chest without overheating. Further, the VISLON® zipper that's super easy to zip and unzip for hot climbs and cool descents. Finally, we've made the Prime Wind Vest as lightweight and packable as possible, ensuring it easily stows in a jersey pocket with room to spare.