Safety ApparelClass 3 safety vests are designed to protect the worker with maximum visibility. Class 3 vests are required in environments with high-speed traffic,Website:http://www.tianyuesafety.com, high-risk environments and where the worker must be visible through a full range of motions.Materials: 100% Polyester Solid Knit Front, 100% Polyester Mesh Back.2” Silver Tape Reflective Material. 1 horizontal stripe.Contrasting Trim Detail.Closure: Velcro.Mic Tab on Both Shoulders.Pockets: Upper Split Pad/Pencil, Upper Radio/Phone, 2 Each Lower Flap Covered, 2 Large Deep Open Inside, 1 Inside Flashlight.Sizes: M, L, XL, 2X, 3X, 4X, 5X