Black Velcro-brand Fabric Fusion hook-and-loop fastener pre-cut rectangles feature a heat-activated adhesive that permanently bonds to fabric. The high-tech adhesive cross-links with the fabric to ensure a lasting attachment, even with washing. Works on most fabrics including cotton and blends, polyester, fleece, suede, canvas, denim, nylon, GORE-TEX and more. Perfect for fabrics that are thick or difficult to sew and for making quick repairs. Ideal for creating no-sew decor, clothing, costumes and seasonal accents. 12 sets of 3/4" x 1" rectangles.