Certainly not for the weight conscious. Strictly a car camper's under quilt but it's what I had . If I recall it is rated to 30 deg.
1.Removed zipper (possible to reuse?)
2.Made channels out of Wally World bargain fabric
3.Sewed channels to sides, top and bottom
4.Inserted shock cord to all channels.
5.Head and foot ends have cord locks for adjustments while
6.Sides attach to triangle thingies which will attach to whoopie slings via mini biners.