These bags are well constructed with knotted ties so that the drawstrings will not unravel. I found no poorly made "rejects" in my order. I like that they are reusable. I use mine for packaging jewelry sales. I do not wash them before use but would not hesitate to try it---I don't think they would fall apart but I would not use hot water to avoid shrinkage. In handling the bags I did not notice any unpleasant fabric finish--they just feel clean. I bought the 3.5 x 4.75 inch bags and they are the perfect size for accepting the largest item I sell. The opacity is very good for my purposes. Each of my items are packed into an anti-tarnish bag, wrapped in tissue, and then put into the bag. Dark color tissue shows a shadow through the fabric, but that is all. The bags accept stamping nicely. I do steam press any that have wrinkles before I stamp them but that is probably not necessary if you smooth them with your fingers. My logo stamp has some small lettering and it is perfectly legible on the bag. The bags came minimally packaged in cellophane (inside of Amazon's packaging). Overall, I would recommend these.