Teardrop jacket/insulation

Just a thought that occurred to me and was looking for some input. What is the feasibility of using some old goodwill blankets and some water proof PVC or vinyl tarp, tent material, or even good tablecloth, to make a three piece snap together "jacket" to put over your tear in cold weather rather than building it in permanent. The thought is to make one long rectangle that drapes from front to back with snaps along the edges, then some profile shaped sides that just snap or button on. With the sides seperable, all three pieces can lay flat on each other and roll up in an old awning bag for storage and travel. A cut out flap to cover the door would use a magnetic seam to seal itself when you close the door. You could also sew in heavy transparent flexible plastic around the windows.
Would this provide adequate insulation for cold weather like a jacket on a human?
It would really change the game on how light your trailer could be built if you didn't need to build sandwich construction for the purpose of insulating.
Thoughts? Criticisms?
Would this provide adequate insulation for cold weather like a jacket on a human?
It would really change the game on how light your trailer could be built if you didn't need to build sandwich construction for the purpose of insulating.
Thoughts? Criticisms?