ok, so i have no access to any mylar, can't order it online cuz i have no where to ship it to. so i was planning on trying to use one of those chrome thermal blankets from the camping section at wal mart. the only thing i wasn't sure about was it says on the package "95% heat reflectivity" (i guess they're designed to keep you warm) and as i'm doing a small dresser grow and summer's coming up, i wasn't sure if this would heat up the box even more or what. any thoughts?