One of the industry's bestselling helmets ever, the 509 Altitude series excels across four key principles: safety, performance, fit, and style. Revolutionary design means precision fit and sleek profiling that exceeds the competition, plus innovative venting and all-day comfort for aggressive riding. The 509 Altitude Helmet features the Fidlock® magnetic strap buckle for easy one-handed operation, plus customizable elements like a removable cold weather breathbox.

FEATURES

• Removable vent stoppers for customized ventilation 
• Comes standard with universal camera mount 
• Comes standard with Fidlock® easy-open magnetic strap clasp 
• Comes standard with our new Pro Series Liner and Cheekpads 
• Comes standard with a cold weather breathbox 
• Innovative aerodynamic channels & 8 intake/exhaust vent ports 
• Meets and exceeds DOT & ECE 2205 safety certification standards 
• One piece eye port trim 
• Perfect 509 goggle fit 
• Revolutionary neck brace ready shell profile 
• Custom fit eps, specially designed for North America 
• Special designed expanded polyurethane chin insert 
• Removable, washable premium liner 
• Dual density, interlocking eps 
• DOT/ECE helmet weight from 1380 grams