Efficient fat burning: Dynamic water resistance is designed to adjust to your training, helping to effectively exercise the upper body while reducing injury risk during intense water workouts. waterproof performance: density EVA foam provides buoyancy and balanced resistance, making these water dumbbells well suited for swimming pool training and enhanced safety in water. Lightweight and safe: Specifically designed for aquatic aerobic and rehabilitation exercise, these foam dumbbells are environmentally friendly, waterproof, and odorless. The antislip, closedcell foam structure minimizes the risk of metal dumbbell impact and keeps them lightweight in water. Versatile features: The water dumbbell set supports upper body strengthening, synchronized arm training, and a range of fitness needs, aiding weight loss and aerobic conditioning. Use scenarios Poolbased cardio and rehabilitation: Perform upperbody resistance work in the pool to achieve effective training with reduced joint impact, suitable for rehabilitation and steady improvement. Aquatic group fitness and home pool workouts: Use in water aerobics classes or solo pool sessions to increase resistance, enhance endurance, and support multifunction fitness goals. Travel, hotel, or spa pool use: Lightweight, portable design with durable foam construction makes them convenient for use in various water environments such as hotel pools or outdoor pools, while maintaining safety and ease of storage.