10 Pieces FR Clothing Patches, Iron on FR Replacement Garment Patch for FR Shirts, Fire Retardant Crew Work Shirt, FR Pants, FR Jacket What You Will Get: You'll get 10 pieces FR patches Size: 1 inch/2.5cm Meterial: High quality embroidered cotton material, with hot melt adhesive on the back, easy to iron How to Use: you can put cotton fabric on the fr patch to secure the cloth before ironing, than set iron to "COTTON", 100-150 degrees, for more than 30 seconds. You'd better sew them if you want keep them on and never fall off. You can use these FR patches for all kinds of FR clothes