Seirus Thermax Headliner

A lightweight, ultra-thin head/face/neck liner built with Thermax® fabric to deliver wicking warmth and a snug fit under helmets, hats or on its own during cold outdoor activity.

Why we like it:

We like it because it combines serious thermal performance in a minimal profile—ideal for layering under helmets without bulk and seamlessly converting between helmet liner, balaclava, skull cap or neck gaiter.

Features and Functions:

Thermax® fabric (100% synthetic) with high wicking capacity; flat-seam construction; 4-in-1 design (helmet liner, balaclava, skull liner, neck-up); lightweight profile for layering.

Fit and Sizing:

One-size fits most; 4-way stretch fabric ensures smooth fit under helmets or hoods without bunching or riding up.

Bottom Line:

A highly functional headliner for cold-weather layering that keeps you warm, dry, and comfortable with very low bulk.