MAXIMUM FUN - Perfect indoor and outdoor treat for training, throwing, playing fetch, developing play skills, keeping their mouths satisfied, chewing, exercising, satisfying their prey drive, and keeping them fit, healthy and entertained for hours. TESTED AND CERTIFIED - Each ball is tested and certified as non-toxic, and safe to be carried in your dog’s mouth. Both the ball sphere and glue are made of natural rubber, and our felt dyes and ink are all non-toxic for complete peace of mind. 6 PACK OF VIBRANT BALLS - Includes 6 completely different, cheerful colours to keep playtime refreshing and different. Each colour is vibrant, and has high visibility, making each ball easy to follow in the air, catch, and find in the grass. 25% STRONGER - The standard doggy tennis ball is 3.2mm thick, so we increased our rubber to 4mm. This means it will last longer, and provide your best friend with more chew time, be more of a challenge, and will save you money over time. THE “STRONGEST” BALLS - We love our dogs, and they are super in love with their dog tennis balls. So, we set out to make your pooch the best, most fun ball on the planet today, one that will last longer and is stronger than all the rest.