Medium Shell comes with a Medium Liner 

Large Shell comes with a Large Liner

To change the fit to a Small, you need to purchase a Medium Shell and a Small Liner.

To change the fit to an XL, you need to purchase a Large Shell and an XL Liner. 

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

The Defender features: 

• 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 Australian standards. 

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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.

Medium Shell is ONLY COMPATIBLE WITH M & S Liners. Large Shell is ONLY COMPATIBLE with L & XL Liners.

Spare liners can be purchased here.

HELMETS SIZE CHART