Your dog is going to love these natural rubber balls!Cleverly designed to be both practical, durable and fun for you and your dog. These plastic-free bright and funky toys are made out of food grade pure natural rubber. This material has antibacterial properties, is biodegradable and, being food grade, is safe for your dog to chew and digest. The toys are excellent boredom breakers, give an outlet for instinctive chewing, and are perfect for play and bonding time. They can be stuffed with treats or paste to make them even more appealing. Specifications Size Guide The Large size is suitable for dogs above 20Kg,Medium size is suitable for dogs above 10kg-20kg.Small size is suitable for dogs up to 10Kg. Story Pet-Fun supplies food grade pure, natural rubber chewing toys in compliance with FDA standard. They partner with a rubber factory with 20 years experience of toy production, which entails the best quality of creative designs and the highest safety standard. They are committed to being environmentally friendly , all packaging materials are recyclable and the products are completely plastic free.