Bag made by Woods Bag & Canvas Co, Ltd. The outer shell is 60% cotton and 40% nylon The inter lining is 75% wool and 25% duck feathers It is fitted with snap closures A flap of wool is sewn to the open end of the bag to protect the head and shoulders of the sleeper. Today, the Woods Arctic Eiderdown Sleeping Robe is generally recognized as the first modern sleeping bag Comes in water resistant duffel bag On the wool side what you see on the blanket is feathers just like using feather pillow on your bed sometimes you find them on your sheets