The super-stretchy rubber lets my lab really sink her teeth in without shredding it, and the water bottle inside adds a nice crunch she goes nuts for. It's held up way better than the plush toys she's torn apart.
My dog usually destroys toys within a day, but this stretchy rubber one has survived two weeks of tugging and chewing. Stuffing a water bottle inside keeps him busy way longer than his other toys, and the rubber still looks brand new.