Brand: Zamp Manufacturer's Part Number: H768D03XL Part Type: Helmets Product Line: Zamp RZ-36 Dirt Helmets Summit Racing Part Number: ZSC-H768D03XL UPC: 873895032230 Helmet Type: Full Helmet Size: X-Large Snell-Approved: Yes FIA-Approved: No DOT-Approved: No ECE-Approved: No SFI-Approved: No Snell Rating: Snell SA2020 Helmet Base Color: Black Helmet Finish: Gloss Fresh Air Compatible: Yes Helmet Primary Color: Black Helmet Graphic Style: None Helmet Shield Included: Yes Vented: Yes Removable Lining: Yes Circumference: 24.400 in. Hat Size: 7 3/4 Helmet Shield Color: Clear Visor: No Helmet Liner Material: Fire-retardant fabric Quantity: Sold individually. Zamp RZ-36 Dirt Helmets Zamp RZ-36 dirt helmets are built specifically for those dirty or dusty environments. They have no front vents， which in return keeps the debris out! Each helmet includes an upper chin curtain (can be mounted as a lower curtain) and removable and washable interior， allowing the wearer to replace with a new liner due to harsh driving conditions or to create a custom fit. The composite fiberglass lightweight shell features a plush interior and 7-top air system， in addition to chin， scalp， and exhaust vents. RZ-36 helmets feature a Z-20 Series 3mm clear shield with tear-off posts， which use 12.25 in. banana style tear-offs. Each helmet also has M6 inserts for head and neck restraints， and two holes on each side of the chin foam for radio or hydration.