For blue screen days, the Digital Key Blue Poly Pro gives you a deep, even blue that keys clean in post, and it earns its keep whenever wardrobe or set dressing rules out green. Stretch it on a frame, light it flat, and the compositor stops complaining. Sizes run from the small 4'x4' up to a 20'x20' for full coverage, all sewn in the USA by LA Rag House.