My dog has destroyed every toy that claims to be "Guaranteed to last." When I spoke to the pet store owner about this, I was skeptical because it didn't seem any different than other toys I've bought for my Labrador, Shadeaux. She's a very aggressive and determined chewer. She's destroyed Kongs before.
I gave her this toy and she chewed on it for 3 hours before falling asleep. The toy survived and when she woke up this morning, it was the first thing she looked for.
This is a great toy and I will be back for other toys made from this material.