Buff Cross Tech Face Mask The fleece layer in the neck area also protects against cold and the Windstopper material is equipped with a soft fleece layer to protect the face from the wind. The Thermo Fastwick material in the upper area not only keeps you warm but also dry. The comfortable seams with ultrasonic and bonding technology ensure an excellent fit and prevent the development of skin irritations. In the area of ??the ears, the Balaclava was perforated to allow a better hearing. The equally perforated mouth area and the opening under the nose facilitate breathing and allow a great removal of moisture.