Twin Critters TennisWools - All Natural Tennis Balls for Dogs - 3 Pack - 100% Merino Wool CHEMICAL FREE: Approximately the size of a tennis ball, but contains NO harsh dyes or synthetic rubbers GREAT FOR INDOOR PLAY: Can be fetched anywhere similar to regular tennis balls, but are also great for indoor play as they make little noise when bouncing EASY TO WASH: Can be hand-washed if soiled, unlike regular tennis balls HANDCRAFTED: Handmade in Nepal using 100% all-natural merino wool