Recommendations for covers

I think my piles will do better with some type of cover. These piles are separated by month. So some months are more than others but I can row them together, just mark the piles inline with a flag or something to keep uniformity. I’m in south Louisiana, sometimes we get more rain than we need, then sometimes we don’t get rain for a month. So I may need to start covering my rows to keep the moisture consistent and keep the sun out. Any recommendations for breathable covers the shed water? Can’t afford no super expensive biomembrane cover.