SAFE BURST-PROOF DESIGN: Made from thick and burst-proof material, the horseplay balls are engineered for superior durability and safety. If, by any chance, the ball is pierced by sharp objects, the burst-proof design will only let the ball slowly deflate instead of sudden bursting.STURDY NON-SLIP SURFACE: The exercise ball has a non-slip surface, which helps reduce potential risks and is essential for a safe play in the field for your horse. Meanwhile, the non-slip surface ensures that the ball cover(sold separately) can fit snugly over the ball without slipping.EXERCISE WITH FUN (NO MORE BOREDOM): A play ball may be a perfect addition to your horse’s workout routines for multiple reasons: provides necessary exercise aid, helps bring out the playful side of your horse, also a great way to burn off some steam. No more boredom!EASY-TO-INFLATE (PUMP INCLUDED): Equipped with an easy-to-inflate foot pump, save time and energy with the pump included in the package. Inflate the ball to approximately 82% during use so that the ball is more flexible and safer.QUICK AND CONVENIENT STORAGE: When the ball is not in use, you can simply unzip, release the air, take off the ball cover, fold it up and store it elsewhere. My mares turn their noses up at it, but they are content grooming on each other and rolling in the sand for entertainment.