Gore Bike Wear Men's Alp-X Windstopper  Active Shell Insulated Vest SHELL: 100% NYLON, WINDSTOPPERMEMBRANE, WADDING: 100% POLYESTER, INSERT: 100% POLYESTER, WINDSTOPPERMEMBRANE, 100% POLYESTER, LINING: 100% NYLON Imported Warm, lightweight, packable. WINDSTOPPER Mountain Bike vest insulated with Primaloft. Perfect to take along on a long mountain tour. Great for changing temperatures in higher altitudes. Slim fit Stretch inserts for optimum freedom of movement Zip with semi-lock slider Zip-underflap 2 front zip pockets 2 side mesh pockets