CETHIAS service dog patches are made of high quality polyester material, very durable. They are removable and interchangeable, you can quickly change the identification of your service dog vest. It can be attached to any type of service dog vest that has a loop strip, if there is no Loop attachment available, you can sew on to vests.<br><br> Why choose our CETHIAS service dog patches:<br> 1. Made of high-quality polyester material.<br> 2. Great value.<br> 3. Can be reuse for a long time.<br> 4. Six Months Warranty and worry-free after-sales service.<br><br> Specification:<br> Material: High-quality polyester<br> Size: Measure around 9cm/3.5inch in length, 4cm/1.6inch in width<br> Package: 4 pieces of dog patches<br><br> Warm Tips:<br> 1. Please allow the size errors due to manual measurement.<br> 2. The colors may exist slight difference due to different screens.