I can make leashes, harnesses, martingale collars, head-halters (similar to gentle leaders) and regular dog collars. They're durable and totally customizable! They have a nylon center (the same as what most store-bought collars are made of) and are then covered in a fabric of your choice. They're a little more flexible and soft than most of the collars I've found. With the correct measurements, I can make almost any size. I will only accept payment (in Simbi coins or services) if you're completely satisfied!