One K Helmets feature several Collections of horse riding helmets to fit the equestrian helmet needs of every rider's tastes.
One K™ Helmets boast the perfect synergy between advanced technology and aesthetically pleasing design. With enough features to appeal to those seeking everything a helmet could possibly offer, wrapped in a package that traditionalists can appreciate, One K™ has the best of both worlds.

One K™ Helmets Collections


The One K™ Defender Collection is comprised of our most popular performers, the staples in the One K™ Helmets line. With a multitude of colors and finishes to choose from, the Defender is an excellent choice for schooling or showing.

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One K Defender

Defender Air

The One K™ Defender Air's pump system provides the ultimate in comfort and custom fit. Three hidden air pockets in the liner can be inflated to your personal preference. Change your hairstyle, or change your mind, just use the hidden air pump and the discreet release valve to change the fit.

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One K Defender Air

Defender Designer

The One K™ Defender Designer Collection invites you to have a little fun with your in-saddle fashion. We have a variety of tastefully eye-catching designs, ranging from a walk on the wild side, to a simple bit of sparkle, and everything in between.

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One K Defender Designer

Defender AVANCE

The Defender AVANCE Wide Brim Riding Helmet combines all of the features of the original One K™ Defender with the addition of a wide brim to offer additional coverage from the sun’s damaging rays!
Certified to ASTM standards.

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One K Defender AVANCE

Racer Skull Cap

Galloping cross country or around the track has never been as comfortable as when wearing the One K™ Racer Skull Cap. The five vents ensure plenty of airflow, while the textured surface secures your cover of choice.

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One K Racer Skull Cap


All equestrian sports are inherently dangerous and involve the risk of serious injury or death. Riders using these products ride at their own risk with full knowledge of the hazards and risks associated with their activities. Helmets are designed for equestrian use only. Helmets cannot offer complete protection from injury or death to riders in case of fall, collision, impact, loss of control or otherwise. Helmets cannot protect areas of the head that are not covered. Helmets offer no protection against injuries involving forces other than impact. CAUTION: HELMETS MUST FIT WELL AND ALL RETENTION STRAPS MUST BE SECURELY FASTENED. Helmets are constructed so that the energy of an impact may be absorbed through partial destruction of the helmet. Helmets that suffer an impact should be destroyed and replaced. The protective qualities of helmets may be compromised by prior impact, age, use and many common substances. Always follow the manufacturer’s recommendations before applying cleaning agents, paints, or adhesives. English Riding Supply disclaims any responsibility for injuries or death incurred while wearing any of the helmets offered for sale. Representations regarding testing results, equipment ratings, product specifi cations, ASTM and/orSEI standards, and the adequacy of all such standards and designations are made solely by the product’s manufacturer. English Riding Supply does not warrant or confirm the representations of the manufacturers. English Riding Supplly makes no representations express or implied regarding the fi tness of these products for any particular purpose nor the extent to which the products protect riders from injury or death.