The Nike Lightweight Running Vest is a sleeveless mid-length vest designed for running and jogging. It features a pullover closure and is made of a mesh fabric that is lightweight and breathable. The vest is insulated with a polyester blend that includes cotton, rubber, and nylon. It is available in size L/XL and is suitable for both men and women. The vest is part of the Nike product line and is model number 9038001003.