LIGHTWEIGHT AND PORTABLE: They are made of a long-lasting EVA foam that dries quickly between uses. The function and form of water dumbbells are fairly straight-forward. Be easy to grip, durable, and provide resistance! A LOW IMPACT & VIGOROUS WAY TO GET A WORKOUT: Water-based aerobics provide an opportunity to exercise in a low-impact environment, without the jarring impact that can be harsh on joints. COMFORTABLE HUMANIZED DESIGN: The way that aquatic dumbbells work is that they take advantage of the waters 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. 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 injury, or take it easy on your joints, water dumbbells are awesome for working your back, shoulders, arms and chest, hel