Yescom 5x100ft Diamond Foil Silver Reflective Mylar Grow Room Film 210D Oxford Cloth Tough and Durable 5X100FT Diamond Foil Reflective Mylar Used to line grow room walls, floors and ceilings to reflect precious light back onto your plants Using this in your room instead of buying many grow tents. Most Practical and Save Big! Great for you to grow exotic fruits, herbs, vegetables or seasonal fruits out of season.