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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.
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