

🧠 Ride Smart, Look Sharp, Stay Unstoppable
The One K Defender Protective Riding Helmet combines a robust polycarbonate and ABS composite shell with advanced ventilation and a customizable fit system. Designed for riders seeking top-tier safety certified by ASTM F1163-15/SEI, it features a washable liner, quick-dry comfort, and a sleek, modern aesthetic. Trusted by equestrians for over a decade, this helmet delivers professional-grade protection without compromising style or breathability.







| ASIN | B008I1I3UC |
| Age Range (Description) | All ages |
| Best Sellers Rank | #295,092 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #228 in Equestrian Protective Gear |
| Brand | One K |
| Brand Name | One K |
| Color | Black Matte |
| Customer Reviews | 4.5 4.5 out of 5 stars (65) |
| Date First Available | April 25, 2012 |
| Included Components | item |
| Inner Material | Mesh |
| Item Dimensions LxWxH | 12.28 x 10 x 9.21 inches |
| Item Package Dimensions L x W x H | 11.6 x 9.9 x 8.5 inches |
| Item Weight | 0.01 Pounds |
| Item dimensions L x W x H | 12.28 x 10 x 9.21 inches |
| Manufacturer | ERS |
| Material | Other |
| Model Name | One K Unisex Defender Protective Riding Helmet, Black Matte |
| Number of Items | 1 |
| Outer Material | Acrylonitrile Butadiene Styrene (ABS), Poly |
| Package Weight | 2 Pounds |
| Part Number | 468259BKMATMED |
| Recommended Uses For Product | Horse Riding |
| Size | Medium Regular |
| Special Feature | ASTM F1163-15/SEI Certified |
| Style | Unisex Defender Protective Riding Helmet |
| Suggested Users | unisex-adult |
| UPC | 841095549391 |
S**O
SAVED ME FROM HEAD INJURY TWICE. BEYOND THANKFUL.
I cannot recommend this helmet enough. It has protected and kept my head uninjured in two very dangerous falls. In March 2020 I got bucked off and hit my head quite hard on the ground, I also broke my wrist as a result. Thankfully, I walked away with my head in place uninjured, the helmet DIDN'T EVEN DENT. My second fall came in August 2020 at Wellington when my horses' two front legs fells through an oxer, I flipped over his head and fell on my back onto the jump. Again, I hit the back of my head on the floor. I walked away unscaved and very thankful to my helmet, which was still intact. These two falls had a lot of potential to be extremely damaging to my head - I am beyond thankful I had this helmet and will continue to buy One Ks! This helmet is also very comfortable, fits well, has AWESOME ventilation (a must if you ride in the heat yearly) and has a sleek design.
A**R
Lived to Write the Review!
🐴 Recipe: One K Equestrian Helmet à la Safety Soufflé Prep Time: 15 years of equestrian experience Cook Time: 0 minutes (helmets don’t bake, darling) Servings: 1 fabulously protected noggin --- 🧪 Ingredients • 1 cup polycarbonate shell (for that crunchy outer layer) • 2 tablespoons ABS composite (adds spice and impact resistance) • A generous scoop of EPS foam liner (fluffy brain cushion) • 1 dash of antimicrobial magic (because sweat happens) • 3 vents (for that breezy, windswept look) • 1 adjustable padded harness (like a hug for your chin) • Optional: CCS color panels for flair and drama • Garnish: A sprinkle of MIPS technology (for rotational impact reduction—fancy!) --- 🧑🍳 Instructions 1. Preheat your ambition to “I want to look cool and not crack my skull.” 2. In a large mixing bowl, combine polycarbonate and ABS until smooth and intimidating. 3. Fold in EPS foam gently—don’t overmix or you’ll bruise the vibes. 4. Add vents one at a time, whispering “breathe, baby, breathe” with each. 5. Stir in antimicrobial liner while wearing riding gloves for authenticity. 6. Adjust padded harness to taste. If it pinches, add a splash of sass and re-tighten. 7. For extra flair, swap out CCS panels like you’re decorating a cake with edible glitter. 8. Serve on top of your head with confidence and a side of horse treats. --- 📝 Chef’s Notes • Helmet should fit snugly, like a well-trained pony’s hug. • If your head rocks forward or backward, your soufflé has collapsed—start over. • Not suitable for microwaving, dishwashing, or emotional support. --- 🎉 Final Thoughts This One K helmet recipe is perfect for riders who want safety, style, and just a hint of drama. Whether you’re jumping fences or jumping to conclusions, this helmet’s got you covered—literally.
V**S
Nice bang for your buck.
Decent quality.
B**D
Flattering, comfortable, lightweight helmet!
I love this helmet! I should note that I returned my original purchase for a smaller size & opted for the suede version, but it's the same model. The helmet is very comfortable, light weight, and so much more flattering than my previous helmets. The leather (I think it's leather) straps are much more comfortable & streamlined than the clunky canvas ones I'm used to. I have a round face, and the placement of the straps is actually very slimming and more comfortable on my face/chin. I haven't fallen off and hit my head while wearing it, but my previous Ovation helmets have offered excellent protection in the past when I have, and I assume this helmet made by the same company should be no different.
A**Z
Super comfortable
Very good quality. My daughter used on her horse shows. Very recommended. Is very comfortable
S**H
Excellent riding helmet.
Helmet is just what I expected. Selling took a long time to get it to me, but it was also the holiday season. Helmet is very comfortable and high quality.
J**.
Great value. Looks great?
Bought this to replace a Samshield and was skeptical because it was 1/2 the price. Pleasantly surprised. Looks great. Fits my head better than the Samshield. Great ventilation. Will buy again
A**N
Great helmet, wrong size
The first helmet arrived quickly and in good condition, but it was a size small, not large as I ordered. I ordered a replacement, noting it was the wrong size and again received a small helmet. I sent both back. The boxes were mislabeled with a small sticker on the side as size large (shown in photo).
A**A
Great helmet -- stylish, comfortable and not too hot. However, the faux suede harness bleeds really badly and after each ride my face is stained deep black on both sides.
Trustpilot
1 month ago
1 week ago