1.EVA 2.Comfortable Design The way that aquatic dumbbells work is that they take advantage of the water's natural resistance. On top of this, aquatic dumbbells are extremely buoyant, which makes it challenging to keep them submerged, providing an added dimension of resistance. 3.WaterBased Training Burns Calories Suspends you vertically in water to create a unique exercise experience. And the greater the resistance in the water, the higher calorie burn you'll experience. 4.Great Aquatic Fitness Equipment Applications: rehabilitation, slimming, yoga, swimming; swimming pool, beach, hot springs. Suitable for adults, children, the elderly, postpartum pregnant women. Also could be interesting toys for your . 5.Environmental Foam Comfortable Grip Aquatic dumbbells are made of high quality EVA material, tasteless and waterproof, and environmental protection, the resistance of the barbells will provide an overall workout for your upper body, lower back and other parts.