Two layers of fabric are reinforced with a 14-ga. galvanized wire mesh. Comes with built-in handle and tie strap. Choose from two fabric covers. Cotton Screen is treated with a permanent, paraffin-based finish which resists water and mildew. Olive-colored cotton duck is 18 oz./sq. yd., 30-mil thick. The yellow and black safety-striped Vinyl Screen resists fire, water, mildew, oils, alkalies and most acids. 13 oz./sq. yd., 12-mil thick.