Grow Tent Canvas is highly reflective, textured silver layer on heavy duty 600d ballistic nylon fabric creates the most rugged reflective material on the market. A DIY grower favorite get creative and build your own custom grow tent/room. Staple to 2? x 4’s and cut holes for …ventilation with ease! Unlike standard Mylar, Blackout Canvas will not smudge, crease, crinkle, or scratch when washed. Use to completely block light from incoming windows and reflect interior light back into your grow space.