Riverbyland Iron On Patches Embroidered Wolf Pack of 3 Fabric Patches Size: 9.5x6 cm Use: iron on patches. The back hot melt adhesive is pro-environment and non toxic. Suggestion: sew on after iron makes patches more firmly. Suitable for clothes, hat, jacket, tote bag decoration and other scrapbook craft. Washing: easy to use, easy to clean. Gentle cycle or hand washing is best.