I"store" my hay, which I buy in bales, in large rectangular plastic bagsI have. They are not sealed, so the contentsdon'tgo moldy. The "bag" just serves to keep the hay from fallingall over my shed floor...The rectangular bags I now use...are becomingdecrepid and "holey" with use and I will have to soon search on theinternet for replacements....My point is, simple plastic bags can serveto store your hay, in a closet if need be, as long as you don't seal itand permit it to get moldy.
Buck