Gore Bike Wear Men's Xenon 2.0 Active Shell Vest 100% NYLON, WINDSTOPPERMEMBRANE, MESH: 94% NYLON, 6% ELASTANE Imported Must have: Super lightweight, versatile piece with mesh on the neck to keep your body's 'engine' air-cooled. Slim fit Mesh inserts in back for ventilation 95 g / 3.35 oz. (size L) Zip pocket on back Long back Front zip with semi-lock slider Mesh inserts in back for ventilation 95 g / 3.35 oz. (size L) Zip pocket on back Front zip with semi-lock slider