GOFF Spring-Assisted Doors are perfect for keeping insects, birds, heat, intruders and flying debris out of your facility, while allowing fresh air in. Rot-, tear- and mildew-resistant, pre-coated woven polyester mesh screens stand up to the harshest weather. 65% shade factor significantly reduces heat from sun while allowing light into work areas. Unique double baffle and vinyl-coated valance panels provide near total protection from insets. Fiberglass tubes (horizontal stiffeners) bend if loaded—won’t bend or kink. Rugged custom extruded guide track traps rollers—wind can’t blow curtain out of doorframe. Tube pockets are reinforced with 18-oz. coated vinyl and double lockstitched for durability.