Industrial Puppy Hook and Loop Patches for Harness - Service Dog, Emotional Support, In Training, Service Dog In Training, and Therapy Dog Patches Reflective SERVICE DOG print in bold letters on a black background for easy identification and added safety Each patch has Hook backing for secure attachment Durable - patches are made of high quality weatherproof polyester Interchangeable/removable - patches can be used for multiple dogs or a dog with multiple roles Money saving - allows you to save money on purchasing additional vests, perfect for anyone who trains service dogs or support dogs