Keep unwanted insects out. This lightweight fabric provides an effective screen to reduce damage from flea beetles, thrips, aphids, whiteflies, striped cucumber beetles, and other insects that are virus vectors. Porous to both air and water. It allows 90–93% light transmission without heat build up and is UV stabilized so it won’t deteriorate quickly. At 0.4 ounce per square yard, it’s lighter, softer, and more flexible than Reemay.