The EcoVeil Sheer Collection from MechoSystems is the first commercial shadecloth/window treatment to meet the stringent Healthier Hospitals Safer Chemicals Challenge and pass NFPA 701 without using chemical flame retardants. Unlike a traditional shadecloth, which can have an industrial feel, this 100-percent polyester fabric has a softer aesthetic. It is available in 1- and 3-percent openness in a broken twill weave and stocked at 118-inches wide.