ISPORT Lightweight Super Warm Duck Down Sleeping Bag with 300 Filling Power Mummy StyleOut fabric:100% 320T nylon fabric/inner :320T polyester pongee Ripstop Filler:1000g with 300 Filling Power white duck down Unfold size 82 * 31 inches (L*W) 300 Fill-Down means light -weight but high warmth so you will be comfortable even from cool spring night..