B&W Poly 10×10 5.5 mil ABWP1
Use the white side for walls and floors, taking advantage of the materials 90 percent reflectivity. When you want to block out light and sun, use the light-resistant black side. Adding this poly film to your walls requires no structural changesyoull leave your place exactly as you found it. Instead of expensive lighting and heating additions, rely on black and white poly.