Midwest Canvas MWC1625 Above Ground Oval Mesh Winter Cover, 16 by 25-Feet Mesh winter covers for above ground pools are made with finely woven black polyethylene Allows water to pass through while trapping leaves, twigs and other debris The fine mesh design allows snow melt and rain to gradually fill your pool These covers can be used year-round in more moderate climates for day-to-day maintenance Comes in oval shape; measures 16-feet width by 25-feet length