Tell everyone and avoid any surprise!
Hippicodes are just like flags that we can set easily to any support (harnesses, bridles, halters,…) irrespective of the material (leather, nylon, cotton, fleece,…).
Scratch size has been studied to be read from a distance without being discomfort for the horse. These are light, highly resisting plastic material (tear-resistant and waterproof).
Also exist with eyelets.