Even if you are a seasoned outdoorsman or woman, be assured that the Lakeside Sleeping Bag will meet your needs. The combination of the soft polyester outer and liner, the quilt-through construction and the 3 lbs. of Insul-Therm fill will keep you warm down to 40 F. The Lakeside Sleeping Bag also features a velcro tab that secures the large 2-way main zipper, which offers versatile venting. This bag will also unzip to convert to a blanket as another option.