Best mesh cover for rainy climate · Best for: Heavy-duty winter mesh cover for inground pools — triple-stitched polypropylene, drains rain and snow through so no cover pump needed. Heavy-duty build tolerates heavy snow and high wind. 25x45ft rectangle at $289.99. NOT ASTM F1346 certified — this is a debris / winter cover, NOT a child-safety cover. For ASTM F1346-rated covers that prevent drowning, see Loop-Loc.