Osprey Atmos AG 50 raincover
I have Osprey Atmos AG 50 and I am trying to buy a rain cover for it. There are two sizes in Ultralight rain cover model.One is 'M' size (upto 50 L) and another is 'L' size (50-75 L). Have anyone bought 'L' size cover? I am bit concerned with 'M' size because when the bag is fully loaded will it cover well? Is it better to go for 'L'?