Color: Black SET - 10 15 20 25 30 LBs Sport: Exercise & Fitness Number of Items: 6 Construction Type: sand-filled professional grade material Our professional-grade slam balls are crafted for durability and are perfect for intense workouts. Filled with sand, these balls are designed to minimize bouncing, ensuring a stable and effective training session. Recommended by fitness experts, these slam balls are ideal for strengthening core, back, leg, and shoulder muscles. They can also serve as an alternative to traditional dumbbells or kettlebells for a variety of weightlifting exercises. Incorporating slam balls into your routine can enhance cardiovascular endurance and improve hand-eye coordination through dynamic throwing exercises.