Our China CHANHONE® Down Sleeping Bag comes in a variety of weight, fits almost all seasons. Can use elastic strap design to adjust when you cold, bottom zipper design can help your feet free when you are hot, can improve air permeability, adjust to what you want. Summer type comfort temperature above 25 ℃, spring and autumn type comfort temperature about 10 ℃ ~ 20 ℃, winter type comfort temperature about 0 ~ 5 ℃ ~ 10 ℃.