Double your fun.balanced.fitness with 2 Mini K9FITbones™! It’s is a fun way to bond with your dog, teach them a new behavior and strengthen the core ~ which is the powerhouse of your dog’s body. Fun fitness training with the Mini K9FITbones™ is also a great way to reduce stress, burn excess calories, and it’s a healthy “job” for your dog. Instability training on Mini K9FITbones™ helps build core muscles, body awareness, and balance. 6p free/pthalate free vinyl plastic TWO SURFACE TEXTURES, RIBBED AND NUBS. Inflate as per instructions. Check surroundings for debris/items that can puncture or damage equipment, if necessary, wash with warm water and mild soap. All seasons, indoor use preferred to protect products from excessive heat and cold/sunlight.