Our Lab Jet destroys everything! Well, okay, he hasn’t destroyed the Kong we bought but that’s because he doesn’t really like it. He loves, adores, worships his Zisc! And although he has really, really tried, he CANNOT even put a dent in it. Not only is it Jet-proof, it is everything else proof, too. We bought it for him when he was about three months old (he’s nearly 2 now) and it has been outside ever since, surviving the hot Midwest sun and deep-freeze winters. It was once lost in the snow for about a week before Jet rediscovered it. It stays flexible even at sub-zero temperatures. We play tug of war, fetch, and “keep-away” with this matchless toy. He puts his considerable jaw into it, chewing away with great determination. But the Zisc comes back for more, and doesn’t show the slightest sign of wear and tear! And on top of all that, you use sustainable and/or non-toxic materials for your products. Ya gotta wonder about some of the stuff other dog products are made of.