Seirus Innovation® Men's 3-N-1 lightweight THERMAX® Skull Liner cap works 3 ways to keep you warm: 1. Fits under helmets, 2. Layers under hats or 3. Wear alone.
Ultra-thin THERMAX® wicking warmth
Made with flat seam construction for comfortable fit
Seirus® gear is made with extremities in mind; to keep your hands, feet, face, and head warm and protected. And not just warm enough to grit through it. When the folks at Seirus Innovation say really warm, they mean like, surprisingly warm.