Using the della Q Tri - Fold Circular Needle Case is a breeze. Just open the case, and you can place your knitting needles in the labeled pockets according to their sizes, from US 2 to US 15. If you have extra needles, use the unlabeled pockets. Small knitting tools like stitch markers can go into the zip pockets. When closing the case, use the elastic and button closure. It will stretch to fit all your needles. As for maintenance, keep the case in a dry place to avoid damage to the fabric. If it gets dirty, gently wipe it with a damp cloth. For the Linen Collection, be careful not to scrub too hard to preserve the fabric's quality. And remember, if you ordered the new Linen Collection colors, they'll take about four weeks to arrive.