The Airhole Animal Series Shark face mask. Airhole masks are designed to help protect your face from the elements. Winter sports activities bombard your exposed skin with rain, snow, sun, & wind. The Velcro fastening Airhole mask provides a barrier against these destructive forces using a weather resistant outer shell & a warm soft lining against your face. Airhole sizing: measure around your head level with the bridge of your nose, S/M 14-21" (35.5-53.3cm) L/XL 16.5-24.5" (41.9-62.2cm).