One K™ Defender Helmet
MSRP $289.95
Additional information
Sizes | X-Large, X-Large Long Oval, X-Small, X-Small Long Oval, XX-Large, XX-Large Long Oval, Small, Small Long Oval, Medium, Medium Long Oval, Large, Large Long Oval |
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Colors | Black Matte, Brown Matte, Navy Matte |
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Description
The Defender Riding Helmet features glossy or matte Polycarbonate and Advanced ABS Composite outer shell; injection molded shell design; washable 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. One Kâ„¢ 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 Kâ„¢ has the best of both worlds. Certified to ASTM standards.
Specification
- Glossy or Matte Polycarbonate and Advanced ABS Composite outer shell Two side, two front, one back, and two center stripe vents
- Comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle
- Washable quick-dry, moisture wicking, anti-microbial liner
- ASTM/SEI F1163-15 certified
Helmet Shape
Regular/Round
Is shaped for a head which has almost identical front-to-back and side-to-side measurements.
Long Oval
Is shaped for a head which is longer front-to-back (from forehead to the back of the skull) than it is side-to-side (ear to ear).
One K™ Defender Helmet Features


Ventilation
Ventilation mesh on both sides, front, top, and back of helmet for a sporty look and maximum airflow.
ABS
Polycarbonate and Advanced ABS Composite Shell.
Stainless Steel
Stainless Steel Mesh won’t rust.

Vermont Rider –
This is an excellent riding helmet. I bought mine at a local tack shop, and it was good that I did, because I was able to try on different helmet/helmet liner combinations. I have a large head (size 7 3/8) and many helmets look ridiculously big on me. The One K Defender in large, combined with a medium liner, resulted in a perfect fit. The color I chose was matte brown, which is very pleasing. The helmet itself has more-than-adequate ventilation. I trust that it will protect me in the event of a fall or running into a tree limb (I trail ride, averaging 160 rides per year). I feel that having the chance to swap and switch liners to get a perfect fit justified paying full retail for my One K rather than ordering one from an online discount vendor. Also, I like to support local businesses, without which one would never have a chance to try things on in person. I am very happy with this helmet and recommend it unreservedly.
Judy –
Since I work for a major equine retailer, I have the privilege to try a number of helmets, as most people do anyway, but I also get the training in helmet fitting as well. When I tried the One K, I was delighted in its features and benefits. It is lightweight and vented which was a huge plus for me especially during the summer months on those hot training days. It has cutting edge features and I love the look. This helmet fits me perfectly and I love that it comes in colors. I am now contemplating buying a second one, just not sure I want the navy or grey! Thanks for making such a super helmet that is truly affordable for the amateur rider!!!
Sarah –
I recently bought one of these helmets as my old helmet no longer would fit me correctly… I had a bear fatal, Traumatic Brain Injury in December of 2009. Part of the agreement for me to go back to riding horses was wearing a helmet because I was told I would not survive another hit to the head. I recently had another brain surgery related to this original injury and am having some unforeseen side effects that effect my vision and balance extremely. So I was encouraged to get another helmet. After extensive research, I saw this to be the best option for me… I can say this is the most comfortable lightweight yet secure helmet that I have ever worn!! Absolute comfort with my thick hair, doesn’t make my head sweaty and itchy like my old helmet and it’s so light weight I don’t feel it on my head yet it’s so secure and well built, I feel confident If anything was to happen. Definitely recommend this brand and will be buying some for my nieces as they grow up!