Waste Canvas Turn plain sweaters, sweatshirts, canvas items, sleepers, etc., into personalized beautiful garments using waste canvas. Simply baste the waste canvas over the area where the design is to be. Stitch on the canvas and through the fabric. When stitching is completed, wet the canvas and with a tweezer or pliers, pull each canvas thread out. What's left is your stitching on the fabric. 100% cotton.