when purchasing fusibles, regardless of weight, it will come with a strip of plastic labeling material that keeps the layers separate. this plastic strip contains the instructions for each and every separate product. after purchasing, fold the plastic strip in half across it's width and sew into a 'bag'.... now store your fusible in this bag in order to keep the instructions WITH the correct product. They do not all have the same information... so only store the correct product in it's 'bag'.... i 'hem' my bags at the top by rolling 2 or 3 times to make stronger so i can use a hole punch thru the hem and hang them on hangers in the closet...