A Seirus Thermax Skull Liner in black showing lightweight Thermax hollow-core stretch fabric, low-profile flatlock seams, ergonomic helmet-compatible cut, and extended ear coverage.
A Seirus Thermax Skull Liner in black showing lightweight Thermax hollow-core stretch fabric, low-profile flatlock seams, ergonomic helmet-compatible cut, and extended ear coverage.
A Seirus Thermax Skull Liner in black showing lightweight Thermax hollow-core stretch fabric, low-profile flatlock seams, ergonomic helmet-compatible cut, and extended ear coverage.

SEIRUS THERMAX SKULL LINER

$29.99
By SEIRUS

Seirus Thermax Skull Liner

Engineered with hollow-core Thermax fiber technology, this lightweight skull liner traps warm air to deliver optimal thermal insulation without adding bulk. The form-fitting multi-directional stretch fabric contours to the head to fit smoothly under ski, snowboard, or cycling helmets. Advanced moisture-wicking properties efficiently pull sweat away from the skin to maintain dry, temperature-regulated comfort during active winter pursuits.

Designed for long-lasting wear and performance, the liner features flatlock seam construction to minimize friction and prevent irritation. The full-coverage cut extends over the ears and forehead to shield critical areas against cold winds and frigid drafts. Quick-drying fabric properties ensure rapid evaporation during intense physical exertion, keeping the head warm and protected in freezing conditions.

Key Features

  • Thermax hollow-core insulation fibers
  • Ultra-thin multi-directional stretch fabric
  • Moisture-wicking and quick-drying performance
  • Low-profile flatlock seam construction
  • Helmet-compatible ergonomic shape
  • Extended ear and forehead coverage

Best For

  • Layering under ski, snowboard, and bike helmets
  • Cold-weather outdoor sports and training
  • High-output winter running and cycling
  • Thermal head protection in windy environments
  • Standalone headwear in cool conditions
View details