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One K Defender Jr Helmet
One K (#29873)

One K Defender Jr Helmet

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(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)

Save 10% Every Day!

Put your horse’s supplements on AutoShip to SAVE 10% every day on all SmartPak brand tack, apparel & gear.

Ride Along Item(s):

The few add-on items we have can be shipped free by syncing them with your supplement on AutoShip, shipping on a Barn Saver Shipping day, or by having a group of add-on items that total over $75. Have questions? Visit SmartPak.com/SmartPerks or call 1-800-461-8898 anytime.

*At least one individual AutoShip supplement or horse’s SmartPaks must be over $40. Some exclusions apply.

Ride Along Item Ships free with a qualifying item. Details

Save 10% Every Day!

Put your horse’s supplements on AutoShip to SAVE 10% every day on all SmartPak brand tack, apparel & gear.

Ride Along Item(s):

The few add-on items we have can be shipped free by syncing them with your supplement on AutoShip, shipping on a Barn Saver Shipping day, or by having a group of add-on items that total over $75. Have questions? Visit SmartPak.com/SmartPerks or call 1-800-461-8898 anytime.

*At least one individual AutoShip supplement or horse’s SmartPaks must be over $40. Some exclusions apply.

Free Ground Shipping
Free Return Shipping
SmartPak Return Policy - YouTube

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:
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FINAL SALE - This item cannot be returned or exchanged.

FINAL SALE - This item cannot be returned or exchanged.

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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
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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.
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Before purchasing this item, please note:

  1. This item can't be shipped to a PO Box.
  2. This product will be shipped directly from the manufacturer using a shipping company.
  3. The freight company will call you to schedule a delivery appointment.
  4. If SmartPak and the shipper are unable to contact you within 7 business days of the product shipping out, your order will be cancelled.
  5. You may be liable for any storage fees due to missed delivery appointments or requests for dates beyond the standard delivery window.
  6. When your shipment arrives, you will be responsible for inspecting the shipment to make sure it's complete and that no items are damaged.
  7. Before accepting the shipment and signing for it, you must record missing items and damaged items on the receipt, and take pictures of any damage.
  8. SmartPak and the manufacturer will not be able to assist you in filing a claim if you haven't noted any damage on the receipt. You will be responsible for filing any claims.

Shipping is not available to Alaska or Hawaii for this item. We apologize for any inconvenience.
Unfortunately, we cannot guarantee that customization items will be delivered by Christmas. If you're adding customization to this item, please note the estimated arrival date in your cart.
Order within and have it by Shipping to
Add these items to your cart to get your estimated arrival date. Shipping to
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.
Lowest Price Guaranteed
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.
We're sorry this item is currently out of stock. Our team is working to get it back in stock asap.

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

Finally, a One K™ designed for children riders in Junior sizing, offering the same protection, quality and comfort as the current One K™ range, but with smaller internal helmet diameter, a thicker padded liner, and a smaller chin strap which is 15mm shorter in length than the adult sizes. Certified to ASTM standards.

Additional One K Helmet Liners also available! 

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!
  • 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
  • Fastex buckle; two side, two front, one back, and two center stripe vents
  • One K™ 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 K™ has the best of both worlds
  • SEI/ASTM F1163.15
Key Specifications
  • ASTM/SEI: Yes
  • Round : Yes
Ingredients
(Maintenance Dose = )
Ingredient Amount
Sizing
Child's helmet, please refer to size chart.

XS - 47-48CM (5 7/8 - 6)

S - 49-50CM (6 1/8 - 6 1/4)

M - 51-52CM (6 3/8 - 6 1/2)
What Customers Say:
Sizing Chart for One K Defender Jr Helmet
Specifications
ASTM/SEI Yes
Round Yes
Reviews
One K Defender Jr Helmet is rated 5.0 out of 5 by 1.
Rated 5 out of 5 by from Fantastic Jr. Helmet This is a great helmet for a junior rider. Lower profile and better fit for a small head which is imperative for safety. Looks great and durable. Glad there is finally a JR helmet available for children that is great quality and safe
Date published: 2019-01-11
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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.

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