The "No Bounds" Collection The Fabric - The "No Bounds" Collection fabric is made from a water wicking, water resistant polyester fabric. Perfect for all of your pups adventures, this washable fabric knows no bounds. The Stainless Steel D-Ring is a great addition to this collar for dogs that love water! Don't stress about rust or corrosion. All of our collars are sewn on an industrial machine using strong bonded nylon thread.