G-FORCE REVO helmets are built with a strategically reinforced composite shell engineered specifically for the Snell SA2015 specs. Across the chin bar and crown of the helmets, you'll see the polished aluminum grill guards of the Siphon12 ventilation network, a system of six intake ports, two forehead ports and four rearward exhaust ports designed to move heat out. The bottom of REVO helmets are more contoured to today's helmet restraint devices and are lined with a rubber gasket made for easy use and cleaning. All G-FORCE REVO helmets include an optically corrected clear-view shield. The interior of the helmets are built around the new modern fit, soft knit, hypoallergenic, padded flame-retardant liner with removable cheek pads. This modern fit is designed for a deeper inset and more contoured shape on the typical head shape. For function, the multiple density, impact liner is made to react to differing impact situations by compressing laterally utilizing tuned zones of multiple densities, allowing the load to spread and dissipating the force. Overview : - Helmet Size: X-Large - Circumference: 23.875 - 24.250 - Hat Size: 7 5/8 - 7 3/4 - Helmet Type: Full - Fresh Air: Yes - Helmet Primary Color: Black - Helmet Graphic Style: Solid - Helmet Finish: Matte - Safety Rating: Snell SA2015 - Helmet Liner Material: Fire-retardant cotton - Helmet Shield Included: Yes - Helmet Shield Color: Clear - Visor: No - Meets DOT Specifications: No - Quantity: Sold individually.