The Poc W's Air Indoor Vest in Rock Salt is made from a material that contains 94% polyester and 6% elastane. This composition ensures excellent breathability and flexibility, making it ideal for intense indoor workouts. The vest is designed with a looser fit, allowing for maximum ventilation and comfort during exercise. Other details include an unobtrusive Poc logo on the chest and a hanging loop on the outside of the neckline for easy drying after your workout.