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

Each of the three Junior helmet sizes can be changed to the other two sizes by changing the liner. See Chart.

Instantly refresh your One K Defender JR helmet with a Replacement Liner. Or, buy an extra to keep as a spare!

Sizes: XS - M

These liners are for the One K JR helmets only. Regular One K liners sold separately.