One K Defender Junior Helmet Liner
The One K Junior Helmet Liner fits in the One K Junior Defender Helmets. Replacement liners easily snap in and out to either refresh your helmet or to change its size.
X-small liner makes helmet fit 5 7/8 to 6 hat size Small liner makes helmet fit 6 1/8 to 6 1/4 hat size Medium liner makes helmet fit 6 3/8 to 6 1/2 hat size.
Please see sizing chart for more info.
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