Exped DreamWalker 650 Sleeping Bag, Medium Shell: 100% Nylon Lining: 100% Polyester. Fill: Grey Goosedown 90/ 10, Fillpower 840 cuinch Imported 850 fill goose down insulation No cold spots or down shift due to horizontal and vertical baffles Tempature rating of -6 C or 20 F Lock zippers features reflective glow-in-the-dark pulls that wont accidently open Tuck-stitch design with bar-tacking at stress points