STABALIZE IT EMBROIDERY STABALIZER. STABILIZE IT! PERMANENT TOPPING STABALIZE IT EMBROIDERY STABALIZER. STABILIZE IT! PERMANENT TOPPING. Please note that this pack has 20 sheets of black and 20 sheets of white (40 total). Permanent Vinyl Prevents stitches from sinking into nap of fabric. Coordinates with your embroidery thread to prevent the fabric from showing through the embroidery stitches, For example: white thread on black fabric. Completely Covers Fabric, nothing shows through. Excellent Stability for dense embroidery. Ideal for embroidery on fabrics with nap such as:velvet,corduroy, terry cloth. Stabilize It Permanent Topping ADS-PTWB1