The fabric in the TM package is like a white nylon... you baste it on to the fabric you want to use and then quilt it... I quilted around the butterflies in the first fabric and in the second I just meandered.. the less you quilt the puffer it gets... You just hold a steam iron over it... don't touch the fabric... the steam does all the work.... the bottom of my bags are just the regular fabric.. I didn't do anything to it... very very simple technique and easy to use....