• Photo of One K Defender Rose Gold Stripe Helmet
  • One K Defender Rose Gold Stripe Helmet in Matching Set

One K Defender Rose Gold Stripe Helmet

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IN STOCK | Ready for immediate dispatch. 

PRE-ORDER | Please allow 4-6 weeks for delivery.

Medium Shell comes with a Medium Liner 

Large Shell comes with a Large Liner

To change the fit to a Small | 53-54cm, you need to purchase a Medium Shell and a Small Liner.

To change the fit to an XL | 59-60cm, you need to purchase a Large Shell and an XL Liner. 

Small & XL or spare liners, can be purchased here.

The Defender features: 

  • A matte Polycarbonate and Advanced ABS Composite outer shell
  • Injection molded shell design
  • Washable, replaceable, quick-dry, moisture wicking and anti-microbial liner
  • Stainless steel mesh
  • Comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle
  • Seven vents - two side, two front, one back, and two centre stripe vents

One K™ English Riding 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. 

ASTM F1163 (SEI marked) - approved to current 2019 Australian standards. 

The base shells for the Defender are Medium and Large.

- Use the Medium size helmet shell with a Small liner to change the fit to a Small.

- Use the Large size helmet shell with an XLarge liner to change the fit to an XLarge.

Please note, the Medium Shell is only compatible with Small & Medium Liners and the Large Shell is only compatible with Large & Extra Large Liners.

Additional liners (spare) can also be purchased here.



53-54CM (6 3/8 – 6 1/2)


57-58CM (7 1/8 – 7 1/4)


55-56CM (6 5/8 – 6 3/4)


59-60CM (7 3/8 – 7 1/2)