One K Defender Refit Riding Helmet Liner
$24.82
Price: $24.82
(as of Nov 06, 2025 04:35:48 UTC – Details)
ONE K DEFENDER REFIT RIDING HELMET LINER
If a One K Helmet does not come in your size, you can easily change the liner for a perfect fit.
One K 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.
Polycarbonate and Advanced ABS Composite outer shell
Ventilation mesh on both sides, front, top, and back of the riding helmet for a sporty look and maximum airflow
Washable and quick-drying liner, hook & loop adjustment, and Fastex buckle
Two side, two front, one back, and two center stripe vents. Injection molded shell design
Advanced technology and aesthetically pleasing design. 12+ years
Amаzon Customer –
Love This Liner
Love that One K makes these. I swap liners in both helmets once a week. So nice to not have a cruddy, sweat stained helmet, especially in Summer.
Gina M Harris –
Awesome!
Perfect for when you are in between sizes!
Christina raef –
Great item
Fits great
Anca Bold –
Five Stars
Very good
Nicole Glusenkamp –
Five Stars
works great in my one k defender helmet
Amazon Customer –
Doesn’t ‘snap-in’ correctly
I got this to replace my old One K liner for my One K Defender helmet. It’s the same size (size small) as my previous one, but for some reason the buttons don’t fasten. They just sit loosely in the socket instead of snapping in. Im still using it as it doesn’t affect the helmet fit to the point where it’s unsafe/unusable, but it’s still not ideal. No idea why I had an issue with mine since all the other reviews seemed to be good.