Kong products are ever popular. They are fun, durable and well designed.
Here's what Kong says about the SqueakAir® Ultra Balls.
KONG SqueakAir® Ultra Balls’ heavy duty durability and varied textures are a win for extending play sessions. The unique non-abrasive felt of the tennis ball is gentle on teeth and gums with plenty of squeaker action to entice play for fun games of fetch.
Fetch toy for healthy; active play
Dual material with varied textures for extended playtime
Non-abrasive KONG Tennis material; softer on teeth
Squeaker entices play