These insect screen meshes are often called no-see-um screen.Finer mesh screening is to protect against tiny, irritating insects. While a more densely woven mesh, this still allows for good ventilation and visibility and provides some daytime privacy.No-See-Um insect screen is available in 4 mesh sizes.No-See-Um Screen, sometimes called 20x20 mesh, is a finer mesh fiberglass to protect against no-see-um, gnats, sand flies, and other tiny insects common in low marshy and coastal areas.No-See-Um is stronger screen that is Suitable for patio, porch and pool enclosures
