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 popular One K™ Defender Riding Helmet with an eye-catching sparkling stone top panel and rose gold stripes and vent.

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™ Horse 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. Certified to ASTM standards.

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 S & M Liners and the Large Shell is only compatible with L & XL Liners.

Spare liners can also be purchased here.

HELMETS SIZE CHART

Small	53-54CM (6 3/8 – 6 1/2)	Large	57-58CM (7 1/8 – 7 1/4)
Medium	55-56CM (6 5/8 – 6 3/4)	XLarge	59-60CM (7 3/8 – 7 1/2)

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