Portable water dumbbells designed for water resistance training in pools and other water environments. Suitable for swimming pools and various fitness activities. Material and comfort: foam construction that is soft and skin friendly; lightweight and buoyant; waterproof and quick drying; easy to clean. Underwater fitness: ideal for underwater exercises and resistance training in water. Targeted training: effectively engages and strengthens back, shoulders, arms, and chest to improve strength and overall conditioning. Design and practicality: compact, portable construction for easy carrying and transportation. Use scenarios: Pool workouts and aqua aerobics: perform upper body resistance routines during lap swimming or class sessions. Beach or open water sessions: convenient resistance training in coastal or lake environments. Rehabilitation or lowimpact training: use in shallow water for gentle, controlled upper body exercises. Specifications and performance: Function: upper body resistance training in water to build strength and conditioning. Compatibility: suitable for most aquatic fitness programs and routines. Size: compact and portable for easy transport and storage. Material: foam, buoyant, skinfriendly; waterproof and quick drying. Performance: provides effective water resistance, easy to clean, and durable for regular use.