One K Defender Air Helmet Size Liners provide flexibility for growing children, shared helmets or riders who wear hair differently for schooling and show. The liners are also a perfect solution for sweaty helmets, just swap out the liner for a fresh, clean and dry one.
- XSmall, Small and Medium Helmets are built on a Medium Shell – Use Small liner to size down. Use Medium liner for Medium size fit.
- Large Helmets are built on a Large Shell – Use Large liner only.
- XLarge helmets are built on a XLarge Shell – Use XLarge liner for XLarge fit.
- Fitted with Pump.







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