Give Fido the Luck of the Irish! Great for hide-and-seek! Mighty Toy Construction: Durability is created for each toy with multiple layers of flexible materials. Compared to other toys, Mighty Dog Toys have no hard edges. The result is that these toys do not promote chewing - great when you're trying to discourage chewing habits. These toys may seem plush on the outside, but all the durability features are internal making these toys soft, yet MIGHTY strong. These toys are machine washable (air dry) and float.