  FEATURES of the Arcteryx Men's Cerium SL Jacket Breathable and insulated backcountry technical jacket with great warmth-to-weight ratio Wind- and moisture-resistant Thiselaâ"¢ outer face fabric Thiselaâ"¢ is a very stable and incredibly lightweight 0D ripstop taffeta that offers and excellent strength-to-weight ratio DWR finish (Durable Water Repellent) helps repel water from fabric surface Lightweight down jacket is both extremely compressible, packing down small into its included stuff sack Down Composite Mapping strategically places Coreloftâ"¢ synthetic insulation in areas where moisture may buildup and down in areas for maximum warmth Coreloftâ"¢ is lightweight, breathable, thermally efficient, compressible, and has excellent loft retention. So versatile. Low profile collar is insulated and features a chin guard Full front zip with chin guard Corded zipper-pulls reduce noise and are easy to grab when wearing gloves Elastic cuffs help keep out the wind and elements Elasticized rear hem hugs the body and helps seals out cold drafts Pair of hand pockets with zipper closure Includes a stuff sack for super easy packing Lightest weight Arc'teryx down jacket filled with their 000 white goose down Backcountry specialist jacket makes a great mid layer or can be worn on its own in cool, dry conditions Ideal jacket for climbing, hiking and trekking, travel, and commuting  