Proton Heavyweight Hoody Women's is a warm, durable insulated jacket designed for climbing, skiing, and snowboarding, built as a warm, breathable layer for high-output missions in cold conditions. Product Type: Women’s warm, durable insulated jacket Material: Synthetic Fill 100gsm Coreloft™ insulation in the body with 60gsm Coreloft™ in the sleeves to reduce bulk Fortius™ Air 50 outer is air-permeable to help speed vapour transport during high-output movement Helmet-compatible StormHood™ and regular fit for layering, with articulated patterning to reduce restriction Pair it with a women’s ski clothing system and add a beanie for cold-day climbing or touring. 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.