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he One K Defender Air riding helmet is the perfect helmet if your head is not exactly round, nor exactly long oval!
You are between standard helmet sizes, or just plain hard to fit ; you like to adjust the fit of your helmet throughout the day; you sometimes wear your hair up, other times down . So how can One K Defender Air riding helmets be so adjustable? The secret is in the Air pump system that provides the ultimate in comfort & custom fit. The 3 hidden air pockets in the liner inflate by depressing its concealed air pump until you get the fit you want.
The Defender Air horseback riding helmet features a matte Polycarbonate and Advanced ABS Composite outer shell; injection molded shell design; quick-dry, moisture wicking, anti-microbial liner; stainless steel mesh; comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle; two side, two front, one back, and two center stripe vents.