Poly film is a thick, flexible material that comes in various thickness (measured in mils) that can be used in single or double layers. Offering an inexpensive option for growers. Our Poly film Greenhouses give your plants and vegetables the benefit of a long-lasting covering that includes excellent light transmission, UV protection, is flexible and durabable. Poly film is easy to install with homeowner’s tools and modest building skills. To help with your Greenhouse selection please call a Specialist at 1-800-987-4337.