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The Seirus Heatwave Thick N Thin Headliner delivers maximum warmth with minimum bulk by combining a thin, breathable Heatwave balaclava top with a thick, 200wt fleece neck section. The Heatwave thermodynamic lining reflects and amplifies your body heat, transforming a lightweight headpiece into a powerful cold‑weather essential. With 4‑way stretch, flat‑seam construction, and a design that fits comfortably under helmets or hats, this 4‑in‑1 headliner adapts to whatever winter throws your way.
Because you want a headpiece that adapts to every winter scenario. The Seirus Heatwave Thick N Thin Headliner combines Heatwave warmth, Polartec® fleece insulation, and 4‑in‑1 versatility in a lightweight, helmet‑friendly design. It’s the perfect balance of breathability, coverage, and amplified heat for cold‑weather performance.


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