I'm planning to buy some polyester fabric to make an industrial strength jumper for a little girl. I was looking at this site, http://www.fashionfabricsclub.com/catalog_items.aspx?TypID=24&Viewby=Types&Page=1, and was thinking of ordering some from them. I noticed though that some fabric is label "double knit" and some is labeled "scuba double knit" and is a little more expensive. Can someone explain the difference? What I would like is the fabric from the 70's that everybody made those garish quilts out of.