Created to offer the breathability, durability, and mobility guides and mountain professionals demand, our warmest Proton delivers air-permeable thermal performance for high-output missions in cold conditions. 100gsm Coreloft™ insulation and the Fortius™ Air 50 outer allow airflow that helps speed vapour transport and balance thermal comfort. 60gsm Coreloft™ in the sleeves and helmet-compatible StormHood™ reduces bulk, the regular fit layers easily, and articulated patterning removes restriction.
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Proton
Air permeable mid layer insulation with abrasion and weather resistant outer surface.
Synthetic insulation
Man-made insulation with quick dry times, durability and retains warmth when damp.
Multi-use
Versatile high performance designs for diverse activities and conditions.