I'm selling this neck warmer because I bought it for my child's soccer, but the uniform supplier changed, and it's no longer needed. Below is information from the official adidas website: Gear up for training on cold days. This neck warmer, featuring COLD. RDY technology, keeps your neck warm from the cold outside air. Made with stretchy interlock material, it can also be worn as a headband or face cover. It features reflectors for visibility in low light. This item uses over 40% recycled materials, part of adidas' commitment to ending plastic waste. A versatile neck warmer with reflectors, made with some recycled materials. * 79% polyester / 21% polyurethane (interlock) * COLD. RDY * 360-degree visibility with reflectors * Bungee cord for adjustable fit * Brand: Performance * Sports: Gym/Training * Category: Accessories * Product number: IB2659 * Color: Black * Model: DMD68 * Technology: Cold Ready