Opt for a casual style with a vest that's easy to layer over a T-shirt or sweatshirt, depending on the weather. Lightweight materials are thin and lightweight, making them feel breathable and comfortable. Product type: Sleeveless Neck: High stand-up collar Sleeve: Sleeveless Closure: Zipper closure Lining: Nylon lining, pleasant to the touch Outer: 50% Nylon, 50% Recycled Nylon; Lining: 100% Nylon; Insulation: 100% Nylon