If it’s good enough to play with, it’s good enough to take a nap with! Lorna is a big fan of tennis balls, but she is also a chewer and would end up destroying them after a few days. We are several weeks after purchasing the Pupreme ball, and it’s still here! It LITERALLY takes a licking and keeps on ticking! They appear slightly smaller than a tennis ball and not too “fuzzy” so it doesn’t get stuff stuck in it that could hurt the dog. Lorna LOVES them!