I own a lot of these original Bigso boxes despite the following issues. The Silvia is made of a curious older cardboard concoction that smells of stuff that could evoke a warning to Californians. Also, the material is not super durable; the lids are always the first to tear after less than a dozen uses. The material can also stain from moisture or dirty hands.But the Silvia is just so nicely proportioned and in great colors that I tolerate all this and try not to breathe too much around them.The dimensions are superb for storing memo-pad sheets upon which you've written stuff you just know you will get to some day. And torn-out magazine pages folded in half. Same for fat quarters or other bits of fabric is you are a quilter.For storing extra special fabric in the long term, I line the box and lid with buffered acid-free tissue paper. Then I line THAT lining (or wrap the fabric bundle) with several sheets of non-buffered acid-free tissue. Buffering agents can migrate and most preservation sources recommend non-buffered paper for cottons and buffered for more organic materials (i.e. now dead, but attached to something previously alive and breathing) like silk, wool, and leather.I go to this trouble because I have lost a lot of collectibles to improper storage. These boxes also prevent sun/light damage to fabrics, a horrible thing to discover too late for many stash builders.