GLI ProMesh safety covers use a mesh material that gives you solid cover benefits without the added weight. With the ability to block 98% of algae producing UV rays, this tight mesh material allows water to drain from the surface – filtering out dirt, leaves and debris. ProMesh safety covers provide all of these benefits while also weighing nearly 50% lighter than a standard solid cover. A submersible pump is included with all ProMesh covers in order to drop the water level of the pool, if necessary. ProMesh covers are available in blue, gray, green and tan.