A lot of sleeping bags can be used as a quilt if desired. I have a WM Summerlite that I mostly use as a quilt but it has the advantage of being zip-upable if drafts become a problem. I have a homemade down quilt I used until I got the Summerlite that is warm to the mid-20°'s unless it or I get out of position. Then, drafts and cold air will wake me up and make me adjust me and the quilt. Then it is back to sleep until the next cold spot comes along. It does not have straps but does have "draft stopper" fabric strips along the sides. For temperatures to around 28°F, I like the Summerlite; it can be used as either a sleeping bag or quilt depending on conditions and it only weighs 19 oz. I can extend it's useability to near 20°F by wearing my clothes to bed. My purpose-made quilt weighs 18 oz. The quilt does have a head hole so I can use it as an insulated jacket but I can accomplish pretty much the same thing by wrapping my sleeping bag around me in cold weather.