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  • Fission SL is engineered for cold and damp conditions; it's ideal for the stop-and-go pace of skiing and riding
  • Gore-Tex® fabric breathes while blocking wind and water; all seams are sealed for 100% protection with tiny Gore seam tape
  • Constructed with exclusive laminated Thermatek™ non-quilted insulation; it offers downlike softness, warmth and breathability, and it continues to insulate when damp
  • Micro seam allowances cut down on weight and bulk
  • Helmet-compatible, insulated and adjustable hood features a laminated brim
  • Pit zippers prevent overheating and internal moisture buildup during physical intervals or in warm conditions
  • Features single-hand-adjustable drawcords at hem and hood, and laminated die-cut rip-and-stick cuffs
  • Laminated handwarmer pockets with water-resistant zippers; 2 large, internal, drop-in mesh pockets
  • The Arc'teryx Fission SL jacket features an athletic, hip-length fit


REI membership


Best Use Hiking
Weight 1 lb. 3.3 oz.
Insulation Type Synthetic
Waterproof Yes
Type Of Waterproofing Gore-Tex waterproof breathable membrane
Back Length Hip-length
Gender Men's
Insulated Yes
Lining Fabric Nylon
Windproof Yes
Hood Yes
Fabric Nylon
Insulation Thermatek polyester fibers