Reflective grow room material:Plant reflection film using safe,healthy,environmental protection,high-quality PETP(Polyethylene terephthalate) material,PETP film has excellent solar radiation transmission performance,it can be the most effective use of light reflection principle for your plants to provide lighting,to promote plant growth..Operating principle:Reflective film have double-sided reflection ability,it can effectively reflects the light of 95%,by reducing the"focus"of light scattered your light,let it evenly onto your plant,so as to promote the growth of plants..Plant protective film:Polyester film is metallized on both sides,and it can provide the most important component of your healthy indoor garden -- light.Through the reflection of light and divergent principle,make all plants have the opportunity to obtain adequate illumination,away from the cold,thus more thriving..Lightweight and durable:Polyester film can be cut into different sizes according to your needs,and it comes in a separate package,easy to carry,light weight, foldable,easy to store,etc..Application scenario:Reflective mylar is suitable for garden greenhouse,sports warm,outdoor survival,natural disasters,accidents cover the body,etc.