Vital Salveo- Outdoor 3WARM Windproof Cross Beanie/Skullies Bamboo charcoal Imported Innovative Fiber-- Using germanium material and bamboo charcoal fiber to make the physical activity get more energy and release the far infrared and negative ions to improve blood flow and increasing oxygen-carrying capacity, keep your better performance to maintain an optimal temperature. Unique Design-- With the sandwich concept design, put breathable waterproof PTFE into fleece fabric, not only have the function of water repellency and windproof but also extremely warm in cold weather. Suitable for winter-- The drop down fleece design for protecting your ears and forehead against the chilly weather of winter. Multifunctional Accessories-- 3WARM series are extremely warm products, you can wear not only on the snow but also in outdoor activities.