The ERGODYNE Balaclava Balaclava is a cold weather face mask made of 92% polyester and 8% spandex. It features a full face opening with a pull-down mask, flatlock seams to prevent chafing, and a breathable mesh ventilation panel. The balaclava has a tapered crown that fits under a hard hat. It comes in black and provides warmth and protection in temperatures as low as -20°F. This balaclava is designed to be worn under a hard hat or helmet.