The CAP Barbell Black Neoprene Dumbbell offers a comfortable grip during your cardio and high-repetition workouts. Each weight is made with solid cast iron and dipped in neoprene for a durable, comfortable dumbbell weight. Dumbbells are used to exercise all major muscle groups, including arms, chest, back, abs, legs and core. The benefits of dumbbell exercises include muscle building, improving core strength, boosting balance, providing better bone health, burning calories, increasing energy levels, enhancing overall mood and more. Dumbbells are perfect for training individual muscle groups or major muscle groups, HIIT workouts and walking. The poundage is clearly marked on each end of the dumbbell to easily identify the weight size. Each weight is sold individually and comes with a 30-day manufacturer's warranty.