Seirus Heatwave Skull Liner
Seirus Men’s Heatwave Skull Liner is a durable performance cap for the winter adventurer. Designed to fit comfortably under a hood and provide unbeatable warmth without the bulk.
Our exclusive Heatwave thermodynamic lining as a skull liner
Flat seam construction
Reinforced stitching for lasting strength
4-way stretch
Cut and sewn, form-fitting construction
Fits under helmet











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