The SealSkinz Waterproof Beanie is excellent because it is waterproof, windproof and breathable. It is made in an acrylic knitted outer material for maximum water repellence. The beanie has a micro-fleece lining in it for warmth, moisture control, and comfort. It is suitable for machine washing at a temperature of 86 degree F/30 degree C or below. It has a simple style that can be worn while hiking, fishing, biking or just a hat to keep you warm. The SealSkinz Waterproof Beanie gives you a close fitting, comfortable feel. The Beanie outer shell is 100% acrylic with a micro porous 100% dri-vent membrane and 100% polyester lining. Beanie is available in multiple sizes and colors.