Covering seats during storage

This question is not for a Ferrari but I always get great feedback on Fchat so that's why I'm asking here. I have my S2000 in storage for the winter in a heated garage which is kept at 50 degrees and was planning to cover the seats after conditioning them. I was told that this would be a bad idea since the seats need to breathe, they are leather. I have factory shipping plastic covers from an XLR that I found fit perfectly they are not too snug so I'm wondering if enough air will be let in. Should I cover them or would I be better off just leaving them uncovered either way they have already been Lexoled. T.I.A.
Rob