if you plan to use space bags they should be taken out often- fluffed- refolded with different folds- and checked carfully for any moisture- if you live in a humid area you should never store them in plastic. mildew ruins textiles. and never store one in a garbage bag- you would not believe how many wonderful quilts have been mistakenly thrown out because of a very poor choice- especially when moving- don't put them into trash bags- some helpful help may take them to the dump-just trying to help.