Hey if you wan tto be really cheap just go to a camping store and buy some emergency blankets for $2 each.
They're thin mylar.
Hang them FLAT.
stinkyattic Reviewed by stinkyattic on . Whats best materjal using on walls? Logicali it should be mirror or thick foil. Some people are talking that white walls are better? Can any1 say which one is better and why?(sry bad english) Rating: 5