One K Defender Helmet Liner

The One K Helmet liners easily snap in and out of your One K helmet. You can use the liners to always have a fresh helmet and to adjust your One K Helmet’s size. These liners work with most One K helmets with the exception of the skull cap, the Air series, and the One K Junior.

• Xsmall Helmets can fit Extra Small, Small and Medium Liners
• Small Helmets can fit Extra Small, Small and Medium Liners
• Medium Helmets can fit Extra Small, Small and Medium Liners
• Large Helmets can fit Large and Extra Large Liners
• XLarge Helmets can fit Extra Large and XX Large Liners
• XXLarge Helmets can fit Extra Large and XX Large Liners

Please see the One K Helmet Liner Conversion chart for more information on sizing your helmet liner.