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One K Defender Suede Helmet

One K
- Item #21806
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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 use the pre-paid return label included in your order within 60 days from 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'!).

Why We Love This

The One K Defender Suede Helmet is perfect for schooling or the show ring!  Features two side, two front, one back, and two center stripe vents that keep you looking good and staying cool in any weather. 


Favorite Features

  • 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


What Customers Say:
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    out of 5
    95% of customers would recommend this product to a friend!
    Tell us what you think!

    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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    One K Defender Suede Helmet is rated 4.8 out of 5 by 83.
    Rated 4 out of 5 by from Decent I've had this helmet for a few months now and it's alright. It's definitely a pretty helmet! The air vents work great. The removable washable liner is a nice feature also. It definitely runs small. And won't fit your head like a Charles owen. If your head is rounder shaped then oval then it's a great helmet!
    Date published: 2017-02-23
    Rated 3 out of 5 by from Good looking but did not fit. I love the look, the construction, the materials. But this just did not fit my head. I wear a medium but this helmet is too tight across my forehead, so sadly I am returning it. SmartPak, please carry the long oval shapes!!!
    Date published: 2016-12-11
    Rated 5 out of 5 by from Love! Such an upgrade from my 20 year old helmet. The removable/washable liner was the feature that sold me on this helmet.
    Date published: 2016-11-16
    Rated 5 out of 5 by from Great show helmet at a good price. I bought this for showing in dressage. I am pleased with fit and appearance as well as its comfort and adjustability.
    Date published: 2016-10-11
    Rated 3 out of 5 by from Great helmet not a fan of the harness I wanted to love this helmet. It fit my head great and was very comfortable. The harness was stiff and uncomfortable. Smartpak was awesome (as always) with returns.
    Date published: 2016-10-10
    Rated 5 out of 5 by from Perfect helmet Fits perfect, super lightweight and extremely comfortable with great air flow, and being able to wash the lining is a HUGE plus! I bought it as a schooling helmet but it looks so good I'm using it for shows. I have been getting compliments on this helmet from everyone!
    Date published: 2016-08-12
    Rated 5 out of 5 by from New show helmet This helmet will be my new show helmet. It looks good, feels great, not heavy at all. and the venting really does create a true sir flow. Highly recommend
    Date published: 2016-08-10
    Rated 5 out of 5 by from Very comfy I bought this helmet 2-3 weeks ago and it is the most comfy thing I've put on my head, it fits well, it shapes to my head, and to add it has great ventilation. Hope this helped if you are looking to buy this helmet. I totally recommend this product
    Date published: 2016-08-02
    Rated 4 out of 5 by from Didn't fit - sent back I really liked this helmet a lot but I immediately sent it back as soon as it arrived. It didn't fit my head at all. I currently have a Charles Owen AYR8 in 7 3/8." I purchased an XL OneK and it did not fit whatsoever. No fault of One K just was WAY too round for my rather oval head. Planning to order a OneK in Long Oval when I get around to it.
    Date published: 2016-07-29
    Rated 5 out of 5 by from Perfect fit! I had to get a helmet with a removable liner because of the hot, humid summers here in Ohio so I chose this one. Initially, it felt snug and "almost" too tight but never hurt, pinched or caused a headache like previous helmets I've had. Also, this one is by far the most comfortable and squishy! My last helmet cost $150 more than this one and never fit this well. Will buy again definitely!
    Date published: 2016-07-19
    Rated 5 out of 5 by from Really worth the money! I have moved from sandy Florida to very rocky Northeast PA a year ago. It occurred to me I had not purchased a new helmet in about 7 years and though now would be a good time to purchase one. The reviews on Smartpak did help with my decision. I was looking for a good helmet but not a super expensive one and I landed on this one. I ordered from Smartpak because I could try it and return it if it didn't fit. I ordered it and it arrived with my regular monthly horse goodies. I put it on, it fit was PERFECT. I love this helmet. It is easy to adjust, comfortable and doesn't move. I forget I have it one but very glad I do.
    Date published: 2016-05-12
    Rated 5 out of 5 by from Great helmet! The main reason that I purchased this helmet was that it came with a detachable and washable liner. I have now worn it for a few weeks and, while the liner is a nice feature and fits securely on my head, what really impressed me is the amount of airflow that you get through the helmet which helps to keep my head cooler. I also really like the adjustability of the chin strap.
    Date published: 2016-04-27
    Rated 5 out of 5 by from Great helmet ! For this price point this is an outstanding value! The helmet is made well and very fashionable.
    Date published: 2016-04-26
    Rated 5 out of 5 by from Very comfortable to wear! The most comfortable helmet yet. I've always worn GPAs but when my client bought one and I tried it on, I had to get one!
    Date published: 2016-04-18
    Rated 5 out of 5 by from Great fit, great value! This helmet is fantastic. Great for show and everyday use.
    Date published: 2016-04-18
    Rated 5 out of 5 by from Beautiful helmet My husband gave it to me for my birthday. I love it
    Date published: 2016-04-14
    Rated 5 out of 5 by from Good fit Since we live in Hawaii we don't have tack store to purchase from. We measured as instructed and crossed our fingers that it would fit. It's been a great fit.
    Date published: 2016-04-11
    Rated 5 out of 5 by from Comfortable and light. I bought this helmet after my last one which I admittedly had for way too long. (Like 15 years) I am so glad that I got it. It breathes and is lighter than my old helmet, I find that I am able to ride much longer because I am not getting so hot. I look forward to being able to wash the liner and have a fresh helmet.
    Date published: 2016-04-06
    Rated 5 out of 5 by from Great price! Love this helmet! Smartpak had the best price. It was $80 more in my local tack shop.
    Date published: 2016-03-25
    Rated 5 out of 5 by from Style and Safety Combined I purchased this to replace my Charles Owen that was 5 years old. I love the gray color and the removable liner.
    Date published: 2016-03-25
    Rated 5 out of 5 by from Super comfortable! This is the most comfortable helmet my head has ever entered! Your head just snuggles right in. Not bulky, full coverage in back, clean and classy looking
    Date published: 2016-03-22
    Rated 5 out of 5 by from Love! Great comfortable helmet that fits really well and looks fantastic
    Date published: 2016-02-24
    Rated 5 out of 5 by from So comfortable!!! I love this helmet. It is so comfortable that I can wear it all day. It looks great for my oval head. You can't beat the price too. I highly recommend this helmet.
    Date published: 2016-02-17
    Rated 5 out of 5 by from Love this Helmet! Time for a new helmet, tried a few of models I knew and decided to give this one a try. Just what I was looking for. I ride in the heat mostly, very well vented, comfortable, lining comes out for washing and sleek and lovely for the show ring. I am very happy with it. Even easy adjustable strap for tweaking once you have it on.
    Date published: 2015-10-30
    Rated 5 out of 5 by from a hidden gem! Before another boarder mentioned OneK I had never even heard of this helmet before but now that I have one of my own theres no way I'm going back. I have had this helmet for months now and it is just like new thanks to the washable liner and the suede being baby-wipable! The air vents are the best I've felt and the helmet looks sharp and is superb in comfort. I love love love the cushioned straps, adjustments, and removable, WASHABLE, padded antimicrobial helmet liner most of all.
    Date published: 2015-10-18
    Rated 5 out of 5 by from Every feature is Excellent! After going back and forth on a new helmet a few times. This one was perfect! Cool was very important to me and the vents are the best. Lightweight so you don't even think about it. Perfect fit. Washable liner. And the best was with all the vents it looks perfect for the show ring and the price is super and would rank it with the much more expensive ones. Happy rider!
    Date published: 2015-10-13
    Rated 4 out of 5 by from Features are great! This helmet had everything I was looking for. Plenty of vents, washable liner, and protection at the base of the skull, turned out to be sharp looking as well.
    Date published: 2015-10-08
    Rated 4 out of 5 by from A bit too big It is really a beautiful helmet and wish it came in a smaller size. The small was still way too wiggly on my head even with the chin strap adjusted all the way down. I still gave it four stars because it really is a nice helmet, it feels light, looks beautiful, and is pretty reasonably priced. Unfortunately, it just didn't work for me and I had to send it back.
    Date published: 2015-10-02
    Rated 5 out of 5 by from Coolest helmet I bought this helmet after another boarder highly recommended it. My head sweats A LOT and I was looking for something cooler. Well I found it! I can actually feel air coming through the vents and when I get done riding I don't have to wring the sweat out of my hair. I love the fit and look of the helmet and will definitely get another one for showing!
    Date published: 2015-09-20
    Rated 5 out of 5 by from Very happy with it! Bought this to keep nice for shows and I'm very happy with it. Nice fit, very comfortable and well padded. It's not too bulky and lighter than I expected it to be. Seems like a great buy for the price!
    Date published: 2015-09-16
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