Features: Removable Goggle Lock 22 Vents X-Static Performance Lining Hybrid Shell Construction Air Evac 2 Ventilation Adjustable Boa® Fit System Snapfit Ear Pads Low-Profile Dual Regulator Adjustable Climate Control ASTM F 2040, CE EN 1077:2007 CLASS B, CPSC certification The Variant's modern twist on a traditional profile masks advanced performance features like our Hybrid Shell construction, Air Evac 2 ventilation, & a fit that is the undisputed king of integration. Classic styling modernized through performance is a hallmark of the Variant that is sure to turn heads. SIZING: (Boa® FIT SYSTEM) + Small 51-55 cm + Medium 55-59 cm + Large 59-63 cm + X-Large 63-67 cm.