The Seirus Dynamax Skull Liner slips under any ski, bike, or climbing helmet to block wind and wick sweat without adding bulk; flat-seam Dynamax fabric stretches four ways for a second-skin fit that keeps ears warm yet breathes on hard climbs—ideal for cold-weather runners, cyclists, and skiers who need feather-light insulation that packs into a jacket pocket when the sun comes out.
Features:
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Ultra-thin Dynamax® 4-way-stretch fabric blocks wind yet breathes
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Flat-lock seams eliminate helmet-pressure hot spots
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Brushed interior adds soft warmth without weight
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Low-profile cut covers ears and back of skull for full 360° warmth
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One-size-fits-most (head circumference 19–24 in)
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Weighs 1 oz—packs smaller than a pair of gloves
Common Q&A’s:
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Will this liner fog goggles?
Thin fabric channels breath downward; pull below nose to further reduce fog. -
Is it warm enough for 0 °F skiing?
Pair with a shell hood for sub-zero wind; alone it handles 10–35 °F aerobic activity. -
Can I wear it alone as a beanie?
Yes—skull-hugger style works for jogging or spectating when a full beanie is too warm.
- Age Group:
- Adult
- Gender:
- Unisex
