If a One K™ Helmet does not come in your size, you can easily change the liner for a perfect fit. Our liners also provide ultimate flexibility for growing children, shared helmets, or women who wear hair differently for schooling and show!

Three shells make up all sizes. The base shells are Medium, Large and X-Large. Use the Medium size helmet with a Small or X-Small liner to change the fit of the Medium helmet into a Small or X-Small. Use the Large size helmet with an X-Large liner to change the fit to X-Large. Use the X-Large size helmet with the XX-Large liner to change the fit to XX-Large.

The Defender Chrome Stripe Riding Helmet features matte 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, and Fastex buckle; two side, two front, one back, and two center 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. Certified to ASTM standards.

• Matte Polycarbonate and Advanced ABS Composite outer shell
• Two side, two front, one back, and two center stripe vents
• Comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle
• Washable quick-dry, moisture wicking, anti-microbial liner
• ASTM/SEI F1163-15 certified

Approved for EA Ruling 2020.

Sizing

Instantly refresh your helmet with the One K removable and washable One K liners. Available in XS – XXL and One K Junior liners are available in XS – M. One K Liners are the easy way to refresh your helmet or size up or down for a helmet that doesn’t quite fit. 

Please check the size guide in images. When purchasing the Onek Helmet, you are purchasing the Shell size. These come with a medium liner for a medium shell, and a large liner for a large shell. If you require a size up or a size down, these can be purchased extra in the OneK collection on our website.

The Defender Chrome Stripe Riding Helmet features matte 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, and Fastex buckle; two side, two front, one back, and two center 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. Certified to ASTM standards.

• Matte Polycarbonate and Advanced ABS Composite outer shell
• Two side, two front, one back, and two center stripe vents
• Comfort padded harness with synthetic suede lining, hook & loop adjustment, and Fastex buckle
• Washable quick-dry, moisture wicking, anti-microbial liner
• ASTM/SEI F1163-15 certified

Approved for EA Ruling 2020.

Sizing

Instantly refresh your helmet with the One K removable and washable One K liners. Available in XS – XXL and One K Junior liners are available in XS – M. One K Liners are the easy way to refresh your helmet or size up or down for a helmet that doesn’t quite fit. 

Please check the size guide in images. When purchasing the Onek Helmet, you are purchasing the Shell size. These come with a medium liner for a medium shell, and a large liner for a large shell. If you require a size up or a size down, these can be purchased extra in the OneK collection on our website.

Helmet Padding

Sometimes the padding in helmets gets lost, worn or extra is needed

various thickness (will be sent random or message if you require certain thickness)

Colour Black