The Original Curtain Wall system, designed to create a retractable barrier for hangars, is available from Goff's Enterprises, Inc. Constructed with a combination of industrial vinyls. Upper and lower opaque PVC sections are 14 ounces per square yard, reinforced with a polyester 9x9x1000 denier weft inserted scrim, which is laminated into the fabric to give the curtain a higher tear and tensile strength without sacrificing flexibility; www.goffscurtainwalls.com.