A double Helix Bundle Of Fun For Your Dog. You And Your Dog Will Have A Blast With This Tough Rubber Toy, Great For Tossing, Tug-o-war, Or Any Old Roughhousing! Chewing This Rubbery Toy Helps Keep Teeth And Gums In good Shape, Too! This Fun Interactive Rubber Toy Satisfies Your Pet ‘s Natural need To Chew And Exercise Its Teeth And Jaws. Designed For Use By Small Dogs. The Double-helix Shape Similar To A Real Molecule Of Deoxyribonucleic Acid Gives The Dog More Space To Chew On.. 100% Natural Rubber.