The Cirq� is a fun round toy shape with a square center. It has a channel around the underside of the toys to make it easier for dogs to carry and is a great place to hide treats! Like all Rhinoplay products, it�s made from PopFoam which is non-toxic to both animals and humans and unlike other foams has a minimal environmental impact during production. Light and super strong, the Cirq floats, is extremely durable and dogs can happily chew into it without damaging their teeth. Perfect for chasing and playing fetch.