Helmet Friendly: The rockbros ski mask with flexibility to wear, compatible with bike helmets, or put the hood in the back to wear ski helmets and motorcycle helmets. Head/Face/Neck Full Protection: The ski mask thermal fleece and extended hem keep you warm in cold weather, great for extreme cold, windy and snowy weather. Water-resistant & Thermal: This balaclava ski mask has double-layer hood design. Inside fabric is polar fleece, skin-friendly and warm enough. Outer layer is made of water-resistant fabric. Windproof&Breathable: The balaclava ski mask has a drawstring that you can adjust the tightness, so that the balaclava fits the face and keeps warm effectively. Multipurpose: Perfect for cycling, motorcycling, skiing and more outdoor activities, the winter balaclava provides you full warm feeling.