The official European website for One K riding helmets
At Unamari, we are proud to offer the full range of One K riding helmets directly on our webshop.
One K – Riders' Preferred Helmet
One K is known for its exceptional combination of safety, style, and comfort. Unamari is the official distributor of One K riding helmets in Europe, and we actively contribute to the design process. Our helmets are designed with a passion for detail and a commitment to delivering products that meet the needs of even the most demanding riders.
Riding Helmets for Every Occasion
At One K, we are dedicated to providing helmets that not only look fantastic but also perform optimally in all conditions. We understand that a helmet is more than just protection—it’s part of a rider's identity. That's why we offer helmets in matte, glossy, and shimmer finishes to suit every taste.
Our Convertible models allow you to swap out various components, making it easy to adapt your helmet for both training and competitions without needing to invest in multiple helmets. Simply switch to a Swarovski top on competition day for an extra touch of elegance. Explore all our Convertible components here.
Avancé helmets
The One K Avancé is a refined and reliable riding helmet, designed to unite aesthetic clarity with modern protection. The signature wide brim offers elegant sun coverage while framing the face with a calm, confident line—ideal for both open-air training and the quiet focus of competition.
Strategically placed front and rear ventilation channels maintain airflow and balance, bringing comfort that lasts—even through long, demanding rides. The sturdy shell and EPS core offer confident, impact-absorbing protection.
Choose between the timeless classic, the advanced MIPS model for added impact protection, the sleek Lux edition, or the Convertible version you can shape to reflect your own style.
Every version of the One K Avancé is crafted with precision and purpose—trusted by riders who value understated confidence, enduring comfort, and design that stands the test of time.
Defender helmets
The One K Defender is a quietly refined riding helmet, designed with a slim, balanced profile. The narrow brim creates a clean silhouette and a light, understated look—ideal for riders who appreciate calm clarity and functional elegance.
Discreet ventilation at the front and back ensures a steady airflow and lasting comfort, even on long, demanding rides. The shell combines a strong ABS and polycarbonate outer with an EPS inner core for reliable, impact-absorbing protection.
Available in a thoughtful range of colours and finishes, the Defender comes in several variations: the classic model, a Pro version with extra side ventilation, a MIPS-enhanced edition for added safety, and the Convertible—designed for those who wish to shape their own expression.
Each version meets the latest international safety standards and offers a measured blend of protection, comfort, and timeless design.
Convertible helmets
The One K Convertible is made for riders who value the freedom to express their own style.
Choose between the Defender, with its slim and classic brim, or the Avancé, offering a broader, more balanced look. Both allow you to customise key elements — top panel, top rail and front —so your helmet reflects your personal aesthetic down to the last detail.
With a wide selection of colours and finishes, you can create a look that feels distinctly your own.
Each model is built with a strong ABS and polycarbonate outer shell and a shock-absorbing EPS core for confident, comfortable protection. Discreet front and rear ventilation ensures smooth airflow and long-lasting comfort—even on longer rides.
Approved to the latest international safety standards, the One K Convertible blends personal freedom with technical reliability in a clean, considered design.
Mips helmets
The One K MIPS is designed with a clear purpose: to offer advanced protection without compromising on comfort or aesthetics. Built with a strong outer shell of ABS and polycarbonate and an inner EPS layer for impact absorption, it also features integrated MIPS technology for an added layer of safety.
MIPS (Multi-Directional Impact Protection System) is developed to reduce rotational forces during angled impacts—those that often occur in a fall. The internal MIPS layer allows the helmet to move slightly in relation to the head, helping to reduce strain on the brain when it matters most.
The One K MIPS is available in a wide range of colours and finishes, and is integrated into several of the brand’s most popular models—including Defender, Defender Pro, Avancé and Lux. Whichever model you choose, it’s certified to the latest international safety standards and designed to bring both peace of mind and clarity of style to every ride.
Lux helmets
The One K Lux is an Avancé helmet with a refined, luxurious design. All models feature elegant Swarovski crystals adorning both the top trim and the distinctive front panel, where each stone is hand-laid in curved lines that follow the helmet’s shape, catching the light with subtle brilliance. It’s an aesthetic detail that elevates the whole without demanding attention—beautifully balanced by the wide, sun-shielding brim.
Lux is available in four carefully curated variations, each with its own visual character—from understated matte finishes to glossy surfaces with shimmering accents.
Every model is built on the solid Avancé shell, combining a shock-absorbing EPS core with discreet, integrated ventilation for all-day comfort and dependable protection.
Naturally, the One K Lux meets the latest international safety standards—crafted for riders who seek technical reassurance and visual finesse in every stride.
Xtreme helmets
The One K Xtreme is designed for riders who move between disciplines and value both versatility and refinement. The helmet comes with both a wide and a narrow brim, allowing you to easily switch between a classic Defender silhouette, the balanced look of the Avancé, or a sleek cross-country profile without a brim at all.
Thanks to the discreet, removable system, transitions are seamless—letting the helmet adapt to your discipline, not the other way around. Xtreme is constructed with a lightweight outer shell made from durable ABS and polycarbonate, paired with an inner EPS layer designed to absorb impact and provide reliable protection. Integrated front and rear ventilation ensures comfort remains constant, no matter the ride.
The One K Xtreme meets the latest safety standards—built for riders who value clean design, flexible function, and reliable protection.
Explore One K Helmets at Unamari
One K’s mission is to support dedicated riders in their pursuit of success.
We share your passion for riding and are committed to providing
helmets that help you achieve your goals.
Tired of compromising on safety?
Do as the elite riders do and choose One K – your head deserves the best.
One K in Multiple Looks
One K’s collections are designed to cover all aspects of the riding experience. From daily training to high-profile competitions, we have a helmet to suit every situation. Our product range includes the following styles:
· Matte Series: For a subtle and stylish finish.
OneK in Multiple Looks
One K’s collections are designed to cover all aspects of the riding experience. From daily training to high-profile competitions, we have a helmet to suit every situation. Our product range includes the following styles:
· Glossy Series: For those who prefer a shiny, modern look.
One K in Multiple Looks
One K’s collections are designed to cover all aspects of the riding experience. From daily training to high-profile competitions, we have a helmet to suit every situation. Our product range includes the following styles:
· Shimmer Series: For an added touch of glamour
One K in Multiple Looks
OneK’s collections are designed to cover all aspects of the riding experience. From daily training to high-profile competitions, we have a helmet to suit every situation.Our product range includes the following styles:
· Chamude Series: For a timeless suede finish
One K in Multiple Looks
One K’s collections are designed to cover all aspects of the riding experience. From daily training to high-profile competitions, we have a helmet to suit every situation.Our product range includes the following styles:
· Convertible Series: For maximum flexibility and customization.
With a One K Convertible helmet, you can swap out the top, rail, and front for a truly personalized look.
Value for Money
We understand that quality and price must go hand in hand. One K riding helmets are an investment in safety and style, and we are committed to offering products that provide great value for money.
Our helmets are popular among elite riders who demand the best, but they are also accessible to the ambitious amateur looking to enhance their performance.
And if you're looking for different looks for training and competitions, you only need to invest in one OneK Convertible helmet with various accessories, rather than buying two separate helmets.
This way, you can ensure your helmet has the right fit and style without breaking the bank. That’s what we call value for money.
Timeless Design and Exceptional Comfort
What’s worse than constantly having to buy a new helmet just to keep up with the latest trends?
A OneK helmet boasts a timeless design, so you’ll always be in style.We combine visual appeal with advanced technology and the highest-quality materials to create helmets that are both beautiful and high-performing.
Our focus on customer-centered design and quality control ensures that every helmet meets our high standards. We listen to feedback from riders at all levels and incorporate their input into our design process. The result is helmets that not only look great but also provide outstanding performance and comfort.
One K Ambassadors
One K helmets are highly valued by riders around the world. Our customers, including professional elite riders, praise the helmets for their fit, style, and safety. This is also true for our team of ambassadors, who compete at different levels and in various disciplines. One of our ambassadors is national team dressage rider Anna Kasprzak, with whom we've worked for many years. She uses One K helmets daily and has this to say about them:
"I think One K helmets are brilliant for many reasons. I’ve personally designed my own helmet, and I love that I can change the top depending on my mood or style – plus, it fits perfectly and provides a sense of security!"
Showjumper Maria Mols also has great experience with One K helmets:
"I use One-K because I want a helmet with high quality and safety. I especially love the Convertible helmet, as you can design your own and easily change the look if you feel like a fresh design."
