This short sleeved vest uses lightweight, cooling mesh fabric in combination with our jersey fabric for comfort and durablity. With a zipper fastening, it includes 4 external pockets, 2 internal patch pockets and contrast tape configuration.Shell Fabric : 100% Polyester, Warp Knit 3.5oz, Contrast Fabric : MeshAir Hi-Vis: 100% Polyester Mesh, ANSI/ISEA 107 TYPE R CLASS 3