The warmest fully waterproof jacket in the Arc'teryx Essentials collection. The Fission delivers a high level of warmth with waterproof, breathable GORE-TEX protection. Designed for severe weather versatility, the thermally efficient construction pairs Coreloft™ Continuous synthetic insulation with a highly air-permeable liner to allow vapor to quickly reach the GORE-TEX membrane.

Available in sizes: XS-2XL 

• Lightweight & windproof
• Waterproof insulated outer layers for severe cold and wet weather
• Durable materials
• Designed for high performance
• Man-made insulation with quick dry times, durability and retains warmth when damp.
• Insulated DropHood™ and collar