This is a flexible sewing thread, it has about 5% stretch, IT IS NOT ELASTIC and doesn't stretch as much as elastic. *** Under Quantity Select a Number for Spool(s) Quantity. Example 5 will mean 5 spools of threads.*** Please note, that this is a flexible sewing thread, it has about 5% stretch, IT IS NOT ELASTIC and doesn't stretch as much as elastic. Coats & Clark Eloflex is an innovative performance thread with excellent sew-ability that allows you to sew elastic seams using a normal lock stitch on a conventional sewing machine with Eloflex as the top thread and in the bobbin. Perfect for leotards, gym clothing, cosplay, swimwear, knit sportswear, and stretch denim. Each spool is 225 yards. Please note: Actual colors may vary from picture due to monitor setup variants.