These curtains are fabricated using seven layers of non-quilted fabric. The outer layer is a UV stable, 9.5oz white vinyl followed with a 4.5oz vapour barrier, 5 layers of non-woven insulating material, a second 4.5oz polythylene interior. Estimated R=3.0 insulation value.. The Faromor Insulated Curtain allows for initial air entry high on the side wall and reduces draft on the birds. It is available in heights from 2' - 8' with a variety of wind protection systems, and can be operated manually or automatically.