Depending on the Material you want to put the patch on, there are 3 options: 1) Iron-on (Cotton Shirt) - usually stays on for about 25 washes 2) Sew the Edges for Permanent Secure Adornment 3) Glue - Use Fabric Glue or all Purpose Contact Cement - Nylon, Polyester and Cordura will likely melt in High Temperatures or a Patch won't adhere You can also use a combination of these for maximum security. Patch is made of Cotton Great for embroidery Size: 3" x 3" Iron-on - Sew-on - Glue-on 1st Quality Recommendation for washing: Do Not use Bleach Use on: Clothing Uniforms Shirts Jackets Hats Bags Crafts Etc... Non-smoking environment