Skip to content
PLEASE NOTE: You may experience errors on our site when using Internet Explorer. Please consider updating your browser, or download Google Chrome.
One K (#32770)

One K Defender MIPS Matte Helmet

Our Price: List Price:
Our Price: Our Price: Sale Price: : $ (%) :
Member Price:
(Members save 5% at SmartPak)
:
SmartPerks Price:
(Because you have supplements on AutoShip, you save an extra 10% on this and all other SmartPak tack & apparel items!)
Your Price:
(You save 5% as a member of . And, because you have supplements on AutoShip, you save an extra 10% on this and all other SmartPak tack & apparel items!)
SmartPerks Price:
(Because you have supplements on AutoShip, you can save an extra 10% on this and all other SmartPak tack & apparel items! Enter promo code PERKS at checkout.)
Your Price:
(You save 5% as a member of . Because you have supplements on AutoShip, you can save an extra 10% on this and all other SmartPak tack & apparel items! Enter promo code PERKS at checkout.)
SmartPerks
Free Shipping (Details)
Ships free with a qualifying item
Free Ground Shipping
Free Return Shipping

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'!).

Customize your program:
:

FINAL SALE - This item cannot be returned or exchanged.

FINAL SALE - This item cannot be returned or exchanged.

- +
Required (Optional)
on every AutoShip order (Details)
You'll love our AutoShip because it's:
  • Focused on happy riders - never worry about running out!
  • Easy to snooze or cancel online, anytime
  • Totally flexible - edit your order as often as you'd like
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
  • Your VIP pass to FREE SmartPerks benefits
PLUS! You'll save % on every shipment if you order this product on AutoShip
Price for one-time shipment:
AutoShip price: Price per shipment:
AutoShip Savings applied
Start date: Customize your program for estimated start date. View estimated schedule
:
Zone Map
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.
of max 255 characters used
Just left - order today! Don't wait - just a few left!
These are for:
Sign in to choose an existing
Order within and have it by Shipping to
Add these items to your cart to get your estimated arrival date. Shipping to
Guaranteed Holiday Delivery:
Standard product delivery is but may take longer due to holiday volume.
All customized items are personalized in our Plymouth, MA facility, and it looks like this item is currently out of stock in that location.
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.

SmartPerks Putting your horse's supplements on AutoShip helps you take great care of your horse, so we take great care of you with SmartPerks! When you order your horse's supplements on AutoShip, you're automatically* eligible for our FREE SmartPerks benefits, including:

  • Free shipping every day
  • 10% off all SmartPak brand tack, apparel, and gear

Learn more about SmartPerks

*At least one individual AutoShip supplement or horse's SmartPaks must be over $40. Some exclusions apply. Visit SmartPak.com/SmartPerks or call 1-800-461-8898 for details.

Overview

Why We Love This

The ever popular One K Defender now with MIPS technology.  Founded in 1996 by a neurosurgeon and a researcher from the Royal Institute of Technology in Sweden, MIPS stands for Multi-directional Impact Protection System and is designed to add protection against rotational motion transmitted to the brain from angled impacts to the head.  MIPS added protection has been independently proven to reduce rotational motion by redirecting forces that would otherwise be transmitted to the brain. One K MIPS helmet features black matte Polycarbonate and Advanced ABS Composite outer shell; injection molded shell design; washable quick-dry, moisture wicking, anti-microbial liner;  and comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle; two front, one back, and two center stripe vents. For best care, wipe down with a clean, damp cloth for dust or dirt;machine wash removable inner liner. Compatible with the CCS Custom Color System.

Imported

CAUTION: Safety equipment must fit properly and be appropriately secured with manufacture approved parts only. Altering or adding to safety equipment voids warranty and can result in injury. As a safety precaution, inspect all products prior to each use.

For additional information on fit, watch our video on how to fit your helmet. Click Here!


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


  • One K Defender now with MIPS technology
  • Founded in 1996 by a neurosurgeon and a researcher from the Royal Institute of Technology in Sweden
  • MIPS stands for Multi-directional Impact Protection System and is designed to add protection against rotational motion transmitted to the brain from angled impacts to the head
  • MIPS added protection has been independently proven to reduce rotational motion by redirecting forces that would otherwise be transmitted to the brain.
  • One K MIPS helmet features black matte Polycarbonate and Advanced ABS Composite outer shell
  • Injection molded shell design
  • Washable quick-dry, moisture wicking, anti-microbial liner
  • Comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle
  • Two front, one back, and two center stripe vents
  • Compatible with the CCS Custom Color System -front shield, top panel and rails can be changed out
  • ASTM and CE EN certified
Key Specifications
  • MIPS: Yes
  • ASTM/SEI: Yes
  • Oval: Yes
  • Round : Yes
  • STILL HAVE QUESTIONS? SEE Q&A
  • 100% Happiness Guarantee
    100% Happiness Guarantee
    At SmartPak, your happiness is at the core of everything we do. We put our products to the test in our barns and on our horses, and back every order with our world-class customer service so that you can shop with confidence. As part of our Happiness Guarantee, we promise you:
    • Expert advice from riders
    • Free shipping every day
    • Free return shipping on sized items
    • Hassle-free returns up to 365 days after purchase
Ingredients
(Maintenance Dose = )
Ingredient Amount
Sizing
XS-XL, Regular and Long Oval
What Customers Say:
Sizing Chart for One K Defender MIPS Matte Helmet
Specifications
MIPS Yes
ASTM/SEI Yes
Oval Yes
Round Yes
Reviews
One K Defender MIPS Matte Helmet is rated 4.8 out of 5 by 16.
Rated 5 out of 5 by from Deep fit, no bobble head for me! Nice deep fit, nice fitting chin strap, I ordered oval large and it fits perfect!! It feels hotter that my previous but I’ll be hot knowing I have stepped up my safety game!
Date published: 2021-10-06
Rated 5 out of 5 by from Great fit! Great features and looks smashing. My husband surprise me with the OneK for my birthday.
Date published: 2021-10-05
Rated 5 out of 5 by from Love the fit! I am so happy I found this helmet. I am looking forward to my first ride with it. But the fit is perfect. The option for round or oval sizing made all the difference in getting it right.
Date published: 2021-09-03
Rated 5 out of 5 by from No more giant pumpkin head! Helmets are, of course, not one size fits all. For my very oval shaped head, One K comes through with the long oval shape! I no longer look like a hot air balloon trotting around my barn. It also is lightweight and looks classy.
Date published: 2021-08-16
Rated 5 out of 5 by from Great helmet We are very pleased with the quality of this helmet. My daughter says it feels great. Loved the storage pouch as well
Date published: 2021-07-26
Rated 5 out of 5 by from GreT features and fit well Purchased recently and fir true to form. Wanted added features for daughter heading to school.
Date published: 2021-07-26
Rated 5 out of 5 by from Great quality Great quality and fit. Would highly recommend purchasing.
Date published: 2021-07-23
Rated 5 out of 5 by from Well made and comfortable I needed long oval- it was backordered but came a month early! Really nice helmet. I show in the hunters and the eq.
Date published: 2021-06-30
Rated 4 out of 5 by from Excellent I bought this helmet because of the MIPS rating and the matte exterior. I am very happy with it. I gave it 4 starts rather than 5 because the material of the strap rubs a little under my ears and on the jawline...It may need to have a softer material wrapped around it. otherwise, excellent choice!
Date published: 2021-05-20
Rated 5 out of 5 by from Great Helmet This helmet5 fits as advertised. Good for an elongated head
Date published: 2021-04-20
  • y_2021, m_10, d_15, h_19
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.19
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_16
  • loc_en_US, sid_22770, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_smartpak
  • bvseo_sdk, net_sdk, 3.2.0.0
  • CLOUD, getContent, 31ms
  • REVIEWS, PRODUCT
Q & A
Videos
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.

Recently Viewed

Qualifying Items

Qualifying items are eligible for free shipping, every day. Look for the badge below on the product page to confirm that your item ships free!
SmartPerks
Free Shipping

Ride Along Items

Ride Along items are eligible for free shipping when shipped with your next AutoShip order or any qualifying item. Look for the badge below to identify a Ride Along item.
Ride Along Item
Ships free with a qualifying item
All of our supplement and product expertise is just a text away. Ask questions, manage your account, and place orders by texting 26756 from your mobile phone. Have a great ride!

Our experts are available
Monday – Thursday 9:00 am – 5:00 pm EST
Friday 9:00 am – 3:00 pm EST

*By texting 26756, you're giving SmartPak your consent to text you to help resolve your issue, including automated replies, at the number you provided. To opt out, text STOP to 26756. Text HELP to 26756 for info. Msg&rates may apply. Consent to receive texts not required to buy products. Terms & conditions and the full Text Message Privacy Policy can be found at https://www.smartpakequine.com/content/2waytextTC in case you're interested.