Make your backpack or tote unique! With an iron on you can create a new look instantly.It'so easy! Heat seal to polyester/cotton fabrics. Do not apply to rain wear (waterproof), highly elastic, rayon, nylon or tri-acetate fabrics. Once applied, applique is permanently attached to the garment and is washable, dry able and dry cleanable. For machine washing, turn garment inside-out before washing and drying. Iron on appliques and embroidered patch setting instructions using an Iron: Step 1: Set your hand iron at the hottest temperature setting. DO NOT USE STEAM DURING APPLICATION! Step 2: Place your applique or embroidered patch in the desired position and place a pressing cloth (such as a handkerchief, sheet or pillowcase fabric) over top. Step 3: Press the iron straight down for 35-45 seconds with as much constant pressure as possible. NO BACK AND FORTH. Step 4: Turn the garment INSIDE-OUT and repeat steps 2&3. Step 5: Allow the applique or embroidered patch to cool down.