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PAC helmet liners are thin hats for wearing under a cycling helmet.

Warm under the helmet

A helmet liner keeps your head and ears warm on cold days and absorbs sweat before it runs into your eyes.

For the helmet to sit securely, the liner has to be thin and lie flat.

Tip: Put the liner on before the helmet and smooth it out. Creases at the back of your head become noticeable after an hour.