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One K (#21806)

One K Defender Suede Helmet

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As riders and online shoppers, we know it can be tough to buy a new bridle or pair of boots without trying them on. That's why we moved the fitting room to your living room (or barn)! From breeches to blankets, if you or your horse can try it on, you can return it, free! Just request a return with a FREE SmartPak return label from your Order History within 60 days of the purchase date. And of course, please make sure the item is in like-new condition with original packaging (we said 'fitting room', not 'war room'!).

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PLUS! You'll save % on every shipment if you order this product on AutoShip
You'll love our AutoShip because it's:
  • Focused on healthy s, because consistency is key
  • Easy to snooze or cancel online, anytime
  • Totally flexible - edit your order as often as you'd like
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PLUS! You'll save % on every shipment if you order this product on AutoShip
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Begin with the zone for the state you are in. Dates shown on the map indicate suggested start and end dates for Fly Stoppers™ shipments. You may want to shift a zone if your elevation or microclimate is unusual, or if you fall on the border between two zones. You can start anytime during the fly season. Choose "Year Round" for climates that have flies all year, and start now.
Program Type Shipment/Application Frequency
Regular Programs: Ships every 4 weeks. For low to average fly levels, frequent manure management and few neighbors.
Premium Programs: Ships every 3 weeks. For high fly levels or weekly manure management or nearby livestock.
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Please call 1-800-461-8898 to order this product.
We're bringing you this product at the lowest price allowed by the manufacturer so you won't find it cheaper anywhere else. This also means we can't apply any further discounts or promotions.

Why We Love This

The One K Defender Suede Helmet is perfect for schooling or the show ring! Plus it’s vented and lightweight to keep you cool and comfortable, even under pressure. Features two side, two front, one back, and two center stripe vents that keep you looking good and staying cool in any weather. 

Additional One K Helmet Liners also available! 


Check out the other items we offer from One K helmets Here!


  • Polycarbonate and Advanced ABS Composite outer shell with an injection molded shell design
  • Inner lining is anti-microbial, moisture wicking, quick drying, and washable
  • Comfort padded harness with synthetic suede lining and Fastex buckle
  • Chamude® synthetic suede covered
  • ASTM/SEI F1163-15 certified
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of customers would recommend this product to a friend!
Tell us what you think!

The reviews provided on this website represent the experience of the individual posting the review. We do not adopt, edit, or endorse any of the submissions posted within the reviews section. Rather, the reviews are part of an online community of animal owners that desire to share their particular experience with other individuals. These reviews are not a substitute for discussing the health of your animal with a veterinarian.

SmartPak customers are some of the most conscientious animal owners around. We encourage you to share your experience with the products we sell to help fellow customers to make informed choices for their animals. We do not edit these reviews in any way - they are direct customer-to-customer communication. We do monitor reviews for positive and negative feedback, and use this feedback to improve our selection as well as sharing feedback with product manufacturers to help them improve their products. Please note that we recommend consulting your vet with serious health issues.

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What Customers Say:
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    One K Defender Suede Helmet is rated 4.8 out of 5 by 91.
    Rated 5 out of 5 by from Comfortable I have a hard time finding helmets that fit properly, and wanted one with a removable liner that can be washed or replaced. This was exactly what I was looking for.
    Date published: 2020-09-29
    Rated 5 out of 5 by from Flattering helmet I have a rather large head and this does not make my head look huge. It also is comfortable.
    Date published: 2019-11-27
    Rated 3 out of 5 by from Problematic chinstrap I really liked the looks of this helmet thanks to the microsuede cover, but I had to return it due to fit issues. The liner of the helmet is well-cushioned and comfortable, and it fit my head well, but the angle of the chinstrap goes too far forward. It was practically on the front of my chin versus under my jaw, so it really wouldn't secure the helmet in a crash. I could imagine the force of hitting the ground would push the chinstrap too far forward and result in the helmet popping right off.
    Date published: 2019-08-14
    Rated 4 out of 5 by from Good helmet I got this helmet in 2017 when I switched from braids to having my hair in my helmet for shows, and it's still like new! I've taken a few spills in it and it holds up very well. My only complaint is that it tends to stab my forehead when I wear it and it always leaves me with a giant bump there, but I think that's probably just a sizing issue. Overall it's a good helmet for a good price.
    Date published: 2019-05-12
    Rated 5 out of 5 by from Good looking helmet The helmet fits well and is comfortable. The chin strap is easily adjustable.
    Date published: 2018-09-12
    Rated 5 out of 5 by from Best Investment First "pricey" helmet I've bought and I am 100% in love! Went with the long oval and it fits like a glove! So comfortable. I have yet to ride in the middle of the summer heat but so far so good.
    Date published: 2018-05-19
    Rated 4 out of 5 by from Not the One For Me I like this helmet when I see it on other people, but it didn't fit me well. I needed a more personalized size than just small, medium or large. The large made me look like a mushroom head, and I think the medium would've been too small. I also prefer real leather/suede to the synthetic materials. I sent it back and went for the Samshield. Thank goodness for free and fast shipping at Smartpak! I do think this is a good helmet for the price range though.
    Date published: 2018-04-26
    Rated 5 out of 5 by from Perfect helmet I bought the One K Defender in black suede about 2 years ago-it is very pretty, light weight, and the vents are perfect for hot Virginia summers! I was amazed to find the small long oval fit absolutely perfectly, my actual size is 7 1/8/22.5”. The liner has just worn out and I’m not sure how to replace that particular liner. I am tempted to buy a navy or gray one-would be great if Smart Pak carried long oval sizes.
    Date published: 2018-04-01
    Rated 4 out of 5 by from Nice looking affordable helmet, but... I really like the One K helmets - they look great on other riders and the helmet part fit me well. The problem for me is that the chin strap angle from the helmet puts the strap in front of my chin. I tried various shapes and sizes, but unfortunately had to go with another more expensive brand :(
    Date published: 2018-02-11
    Rated 4 out of 5 by from Great Helmet My daughter loves this helmet. It has so many vents so much more breathable than her old Charles Owen, and the style works better for when she shows Jumpers, but still beautiful for Hunters, whereas the CO is definitely more of Hunter-only style. She loves the sleek elegance of it - even her trainer has the matte version too! The liner allows for a more contoured fit, and I love that it so much easier to clean as it just pulls out for washing, and if it's worn down, I can just order a <$20 replacement. Couldn't do that with CO. For as much as investment as a good helmet should be, this is a BIG selling point for a mom. Only thing, order up in size - i thought we had 1/8-1/4" leeway on the size range listed, but once she puts her hair up for shows, or hot Texas summers days to get it off her neck, it won't fit. We had to exchange immediately after trying, and that took forever (the one downside to SmartPak). but if her hair is down, it's not too spacious so it works! Teen approved!
    Date published: 2017-08-04
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    Q & A


    One K Defender Suede Helmet Review
    Kerri from SmartPak talks about why she thinks the One K Defender Suede Helmet ( is so smart. The smartest reason to get yours at SmartPak? Free Shipping Both Ways! At, you'll get free shipping every day on all orders over $75 and free returns on all sized items. Just another way it pays to be $mart.
    How to Shop for a Helmet
    Have you ever struggled with the idea of buying a helmet online? Watch this video for tips & tricks on getting the right helmet fit.

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