The Dumbbells are highly visible, make a great retrieval toy and also float on water, making them suitable for both land and water training. The Company of Animals Training Dumbbells are ideal for play and serve as a versatile tool used to teach retrieval training. Made from highly visible molded plastic, the dumbbells are very tough and durable, and they float in water too! The CLIX dumbbell is robust enough for everyday play! Available in three sizes to suit all breeds of dog.