Add 7% per patch Plastic Backing Add 7% per patch Adhesive Backing Add 12% per patch Velcro Backing Add 8% per patch Pin Backing Add 7% per patch Merrow Border Add 10% per patch Magnetic Backing Add 10% per patch Fray Edges Add 15% per patch Double Felt Add 7% per patch 3D Patch Add 45% per patch Glow in Dark Add 25% per patch Glitter Felt Add 20% per patch Metallic Thread