Cerium Series: Streamlined, lightweight goose down filled jackets made of a composite construction to provide warmth where it is needed most. High warmth to weight ratio. SL: Super Light. Uses the lightest weight materials available to provide high weather protection, performance andor packability, but with the right amount of durability. As the lightest down piece in the collection it functions primarily as a warm mid layer. Down Composite MappingTM strategically places CoreloftTM synthetic insulation in areas where moisture may buildup, down in the core and the hood provides maximum warmth. The NEW super lightweight ThiselaTM face fabric with DWR provides light moisture protection. Features: Moisture resistant outer face fabric Breathable Insulated Great warmth to weight ratio Lightweight Compressible and packable Wind resistant DWR finish Durable Water Repellent helps repel water from fabric surface Down Composite Mapping strategically places CoreloftTM synthetic insulation in areas where moisture may buildup and down in areas for maximum warmth Insulated collar Low profile collar Chin guard Full front zip with chin guard Corded zipper pulls reduce noise and are easy to grab Elastic cuffs Elasticized rear hem seals out draft Two hand pockets with zippers Includes stuff sack Trim fit, Hip Length Weight: 185 g 6.5 oz Activity: Rock Climbing Ice Climbing Alpine Climbing Hiking Trekking TravelCommute Materials: CoreloftTM 100 100 gm insulation. Made with highly crimped multi denier siliconized polyester yarn, this lightweight, breathable, and thermally efficient, 100% polyester staple fiber is very compressible and has excellent loft retention. 850 fill European grey goose down CoreloftTM 40 40 gm insulation. Made with highly crimped multi denier siliconized polyester yarn, this lightweight, breathable, and thermally efficient, 100% polyester staple fibre is very compressible and has excellent loft retention. Thisela 100% nylon 1.9 ozyd , 20gm . A very stable incredibly lightweight 7D ripstop taffeta that offers and excellent strength to weight ratio.