One K Helmets

Shop the best selection of One K Helmets. Enjoy premium style and protection with the One K Defender Helmet, One K MIPS CCS Helmet, or One K Skull Cap. We have the One K Defender in a variety of styles and colors. One K’s versatile sizing system based on 3 core-shell sizes makes them perfect for riders with short or long hair, and growing kids. 

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15 products

Still deciding on which One K helmet is right for you? Check out our One K Helmets Size, Fit, and Style Guide.

A Little About The Brand

One K helmets are a blend of next-level safety technology and aesthetic design. Every helmet is composed of a Polycarbonate and advanced ABS composite and an EPS liner for superior impact absorption. One K helmets are put through three different tests and have scored above the required standards in all tests. Comfort is also a priority. A padded harness with synthetic suede lining and an adjustable hook and loop closure with fast-tex buckle ensure a perfect fit.

Why You’ll Love One K Helmets

While safety and comfort are paramount, One K helmets are also exceptional in their appearance, ensuring you stand out in the ring! With options in glossy, matte, suede, and Swarovski crystals, you’re sure to find a style you love.

Popular Products

The One K Defender Helmet is a top choice, with all of the brand’s safety features and an anti-microbial, moisture-wicking, quick-drying, and washable liner. The Defender comes in Matte and Suede as well. You may want to keep an extra One K liner on hand, so you have one to wear while the other is in the wash!

What Others Are Saying

I am in LOVE with this helmet. Seriously this has to be the most breathable, year around, comfortable helmet. I wish more helmets fit this great! I just upgraded to the new wide brim version and I’m still in love with the design and fit of One K helmets!  

I am OBSESSED with the new MIPS Convertible One K Helmet! Choose from endless color options to perfectly embody your style in every ride. Can’t wait to show my custom creation off on the XC course this summer. - Meredith G.

Still not sure which One K Helmet to choose? Check out our One K Helmet Size, Fit, and Style Guide.