Features650 fill power down top and synthetic fill bottom provides exceptional warmth-to-weight ratioAnti-snag, two-way YKK zipper opens from the bottom or top to easily control the flow of airBuilt-out foot box for plenty of comfort where it's needed mostMummy hood with draft collar and draw cord reduces draftPacks down small with included compression sackSpecsWeight - 3.1 lbs / 1.7 kgTemperature Rating - 20 F / -7 C Dimensions - 82 x 30 in / 20 x 8 cmPack Dimensions - 14.25 x 9 x 9 in / 36 x 23 x 23 cmFill Power - 650 FPInsulation Type - 80/20 Grey Duck Down (TOP) // Synthetic (BOTTOM)Shoulder Girth - 58 inShell Material - 20D Nylon 400T (WRC6)Warranty - 2