Coast Multi - ThermoNet® Balaclava. Extra lightweight balaclava ideal for full-face coverage during high-intensity activities like running, hiking, skiing, and cycling. Take your performance to its highest level thanks to its wicking and insulating properties. The new BUFF® ThermoNet® Balaclava has multiple ways to wear for ultimate versatility and a ponytail opening for extra comfort. Design: Patterned. Size: Adults.