I don't think Joann's hires people for their sewing knowledge. I need some HEAVYweight interfacing which you have to ask for from the ladies at the cutting table. The employee picks up the first bolt she comes to and says "this is the heaviest we have". It was featherweight!. I had to insist she keep looking and she repeated that the the featherweight was a heavyweight interfacing. (gimme a break!) Finally another employee stepped in with a heavyweight interfacing. I like Joann's because of their coupons and selection of tools and notions, but don't go there expecting any intelligent answers to your sewing/quilting questions or salespeople who know anything about what they're selling.