High quality embroidered cotton material with hot melt adhesive on the back, easy to iron or sew. The hot melt adhesive on the back of the patch will melt due to heat. Before ironing, you can place a cotton cloth on the patch to secure the fabric. When ironing patches, keep the fabric dry and control the preheating temperature. If you want them to stay in place, it's best to sew them up. Very suitable for DIY themed clothing repair accessories decoration. 3cm L x 3cm W