The Sunflex Tropical Diving Balls are made from high quality, durable, neoprene material. The Tropical Diving Balls actually stand upright under water, making them ideal for improving diving and swimming skills, or for just having a great time at the swimming pool. Three diving balls are included, each adorned with colorful and fun design. This bright design is eye catching and easy to see when diving underwater, so you will never lose your Sunflex Tropical Diving Balls. Made of high quality neoprene, these diving balls are waterproof and UV resistant. Waterproof qualities ensure that your Sunflex Tropical Diving Rings will not suffer water damage and can be used anywhere from the swimming pool to the beach. UV resistance also prevents sun damage, so that they can be enjoyed for hours in the sun. Each ball weighs approximately 5 ounces, and the tail makes these easy to see and grab under water. The design of the diving balls make them fun to use in the swimming pool with the whole family. Using diving balls can help you learn or improve your swimming skills all while having fun! Perfect for fun and exercise!