Polaris Cranium helmet liner review

Scalp-warming ultra-thin hat

Our rating 
4.0 out of 5 star rating 4.0
GBP £15.00 RRP
Polaris Cranium helmet liner

Our review

Effective extra insulation for your bonce without overheating
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Super-ventilated helmets are all well and good in the height of summer, but as winter approaches keeping your head warm becomes more important. This super-thin hat is designed to fit unobtrusively under your lid.


It’s made of stretchy fleece on top, with windproof panels over the forehead and ears, and it’s shaped to fit snugly over your ears. It’s very effective without being too hot, which is a problem we’ve had with some similar hats.

Product Specifications


Name Cranium helmet liner
Brand Polaris

Description # Designed to be worn under the helmet giving additional thermal protection to the head and ears # Made from Therma-Stretch™ material - with windproof panels over the forehead and the ears # Anatomical shape, to keep the ears warm in the windiest conditions # Packs up small when not in use # Breathable and quick drying fabric for comfort in extreme conditions # One size fits all
Clothing Sizes Available One Size Fits All
Available Colours Black/Green Black/Pink