Combining the naturally anti-odor properties of merino wool, and the added durability and moisture management of recycled polyester, the Alpine Onset Merino Balaclava is an easy choice for winter layering without overheating. Wear it alone or underneath a helmet for whatever your winter calls for - skiing, splitboarding, fat biking, trail running, and more. FABRIC : 47% Merino Wool (Non-Mulesed), 47% Recycled Polyester (Repreve), 6% Elastane Jersey (150Gsm)