The BreathXchange Full Mask Sport protects your heart and lungs from the detrimental effects of breathing cold air, especially when exercising! It is ideal for fall or winter outdoor activites, keeping your core body temperature warm and reducing dehydration as the retained moisture is breathed back in to your lungs! This top of the line Full Mask covers the entire head and is comprised of three fabrics. The top is made of a thin antibacterial fabric designed to wick moisture away from your head while wearing a helmet. The face cover is made of a Polartec Aqua Shell combination which is windproof, waterproof and breathable. The protective neck and ear portion is made of Polartec Powerstretch fleece which is warm, soft, comfortable and quiet. * The thin top can easily be pulled back for added head ventilation.