Seasonautumn winter spring whats in the box2 sleeping bag materialsspinning cotton polyester taffeta oxford flannel categorysleeping bag activityindoor outdoor traveling camping hiking beach fishing hunting size18m 20m functionwicking waterproof flannel lined ultra lightul rectangular breathability moistureproofmoisture permeability keep warm windproof foldable anti insect sun protection dust proof anti mosquito portable length cm190 notedouble sleeping bag quantity2 p