When I was decluttering my Florida house I put all my fabric into plastic totes as this was Florida and its wet, humid, hurricanes, etc. so wanted to protect them the best way I knew. Of course I hadn't realized it would take 3 years to sell the house and then move, look for another house, remodel it and finally move in. This took a total of 4.5 years. My fabric came out just fine and I still have a tote or two containing fabrics which I just don't have room for on the shelves. True, they do claim its not good for the fabric but I haven't seen any effect to mine. I have both cotton, fleece and dress apparel type fabrics. Plus, though my household goods were to be stored in an A/C unit, I doubt they were as some of my items were discolored a yellowish color, my albums were bowed from the heat that led me to this conclusion. And we know just how hot it gets in Florida plus inside a storage unit. So you do the math.