Fabrics are of the highest quality and have hook & loop tape sewn around the perimeter for an even, taut and secure fit to the frame, even during periods of strong winds. Scrim Jim is a strong, collapsible diffusion and reflector system. Frames are made of lightweight aircraft aluminum. Modular construction allows you to create three easy-to-handle frame sizes. The unique modular design allows for easy portability as well as quick set-up and take-down.