The lightest, warmest insulation. Period. Our next generation Downlight has deep roots; its ancestor was a favorite of Jim Whittaker???s when he became the first American to summit Everest in 1963. Zippered handwarmer pockets. Contrast First Ascent logo on hem. Eddie Bauer ® - Expedition logo on left sleeve. | 100% ripstop nylon World's Best Down ® ;: 800 fill power premium northern European goose down. Ultra-light, ultra-warm, ultra-compressible. 1.18-ounce, 20-denier ripstop nylon with StormRepel ® durable water-repellent finish Slim, active fit that???s cut closer to the body with no bunching or binding Weighs less than one pound, but remarkably thermally efficient: more warmth, less bulk Easy-running zippers Elastic binding at cuffs and hem to seal out nasty weather and trap heat Packs into its own exterior pocket