Arc'teryx Men's Fission Sv Jacket N80p-X GORE-TEX Imported Zipper closure Machine Wash FISSION SV JACKET - The Fission delivers a high level of warmth with waterproof, breathable GORE-TEX protection. ARC'TERYX ESSENTIALS - Versatile high performance designs for diverse activities and conditions. FISSION - Waterproof insulated outer layers for severe cold and wet. Lightweight and windproof. SEVERE WEATHER - Most durable materials and weather protection, for prolonged exposure to severe conditions. SYNTHETIC INSULATION - Man-made insulation with quick dry times, durability and retains warmth when damp.