Seirus Thick N Thin Headliner

The Seirus Thick N Thin Headliner combines an ultra-thin Thermax hood with a Polartec micro-fleece neck-up in one 4-in-1 package that slips under ski, bike, or climbing helmets to block wind and lock in heat; flat-seam construction eliminates chafe while the four-way stretch fabric breathes during high-output ascents—ideal for cold-weather runners, skiers, and cyclists who need lightweight, packable warmth that adjusts on the fly. Features: 4-in-1 design: hood, neck-up, face mask, or headband in seconds Thermax hood wicks sweat and dries fast during aerobic efforts Polartec micro-fleece neck-up adds soft, breathable insulation Flat-lock seams prevent helmet-pressure chafing on long days Four-way stretch fabric fits heads 20-24 in without compression marks Weighs 2 oz & packs into jacket pocket when temps rise Common Q&As: Will the fleece neck-up fog goggles? Thin micro-fleece channels breath downward; pull hood below nose to further reduce fog. Can I wear just the neck-up without the hood? Yes& hood tucks inside neck gaiter for beanie-only or neck-up-only wear. Is this layer warm enough for 0F skiing? Pair with a shell hood for sub-zero wind; alone it handles 10-35F aerobic activity.