The Cooling Skull Cap Helmet Liner is crafted from a blend of polyester and spandex, offering breathability and lightweight comfort. Its sweat-absorbing design dries quickly, efficiently wicking moisture away while shielding you from the sun or cold air. Featuring a stretchy, one-size-fits-most design, it ensures a snug fit for a variety of head sizes, making it easy to wear. Perfect for both indoor and outdoor activities such as hiking, cycling, biking, and other sports, it’s an essential accessory for sports enthusiasts.