Using the della Q Tri - Fold Circular Needle Case is a breeze. First, open the case by unfastening the elastic and button closure. You can place your knitting needles in the labeled pockets according to their sizes, from 2 US (2.75 mm) to 15 US (10 mm). If you have extra needles, use the unlabeled pockets. For small knitting notions like stitch markers or cable needles, put them in the zip pockets. When closing the case, make sure the needles are neatly placed so the closure can work properly. As for maintenance, keep it away from sharp objects to avoid tearing the linen and denim. If it gets dirty, you can gently wipe it with a damp cloth. Just remember, the new Linen Collection colors will take about four weeks to arrive, so be patient!