Refresh your helmet interior with the Fly Racing Sentinel Replacement Comfort Liner. Designed as a direct replacement for the original liner, this factory replacement part restores comfort, support, and a secure helmet fit.

Helmet liners naturally compress over time from regular use, sweat, and repeated wear. Installing a fresh liner can help bring back the original feel of your helmet and improve overall comfort.

Multiple liner thickness options are available, allowing riders to fine-tune helmet fit. A thicker liner creates a more snug fit, while a thinner liner provides additional room.

The Sentinel comfort liner is removable, washable, and designed to maintain the original fit and performance of your Fly Racing helmet.

• Genuine Fly Racing replacement comfort liner
• Fits Fly Racing Sentinel helmets
• Restores helmet comfort and fit
• Replaces worn or compressed interior padding
• Multiple thickness options available for fit adjustment
• Removable and washable design
• Helps keep helmet interior fresh
• Direct replacement installation

Selecting the Correct Comfort Liner:

For the original factory fit, choose the replacement liner that matches the size range and thickness originally installed in your helmet.

Available Sentinel liner options:

XS–LG Helmet Shell:
• 7mm
• 9mm
• 12mm
• 15mm
• 18mm

XL–2XL Helmet Shell:
• 7mm
• 9mm
• 12mm
• 15mm
• 18mm

Adjusting Helmet Fit:

You can change liner thickness to fine-tune helmet comfort.

• Thicker liner = tighter fit
• Thinner liner = more room

Remove your current liner and check the size/thickness tag before ordering. Match your current liner for the original fit, or adjust the MM thickness if you need a slightly tighter or looser feel.

Liner adjustments are intended for minor fit changes and should not be used to correct an incorrectly sized helmet.