This dog disc is very durable, but it flies poorly. The outer ring is made from very tough and somewhat soft rubber. The problem is that this rubber is a bit floppy and quite heavy. The floppiness makes it hard to throw accurately. The heavy weight makes the disc sink quickly, which makes it very hard for the dog to catch it. The Hyperflite 'Jawz' discs are about the same price and work MUCH better. They are also nearly indestructible, but they fly great too.