1 SUPERIOR MATERIAL: Made of premium PE material, the water dumbbell is chlorine resistant and can be dried quickly between use. Compared with the traditional EVA dumbbell, it is durable, and will not age and crack; the integrated handle will not break like the EVA splicing type. 2 HELP YOUR BODY BECOME HEALTHY: Water dumbbells are a perfect way to get a great workout for those who want a strictly low-impact workout. Whether its because you are coming off the injury, or taking it easy on your joints, water dumbbells are awesome for working your back, shoulders, arms, and chest, helping you get stronger and get in better shape. 4 MULTI-PURPOSE: This dumbbell can not only be used in water sports, or training, you can also fill it with water or sand, etc. so that you can use it for strength training as a normal dumbbell. 5 PERFECT FITNESS EQUIPMENT: Use for rehabilitation, slimming, yoga, swimming; swimming pool, beach, hot springs. Suitable for adults, children, the elderly, postpartum pregnant women, etc. 3 ULTRA BUOYANT: The water dumbbells are highly buoyant, which means they work well underwater to offer the perfect amount of resistance in your workout. Build muscle or burn fat without straining your joints by working out in the water. Develop your upper body and get maximum results with minimum impact.