Aurifil makes thicker thread 40 wt up to 12 wt. that shows great for machine quilting. Also Aurifil has a poly and bobbin thread 60 wt - 80wt. Not many places carry all the Aurifil sizes and weights. I had one LQS tell me Aurifil only made 50wt or 40 wt cotton and no big cones could be bought only the spools. I took some of my huge cones right back to show her along with size 12 wt and 28 wt spools. She wouldn't even look online to check said it wasn't real Aurifil. People that don't know shouldn't be selling. She never got a penny of my money. I usually use Glide thread for all my machine quilting. When a thread sews with no shredding, breaking, or nesting then that is the thread I will use every time and Glide has never given me one problem.