Features: 1. Choose from 4 weight options to match your training needs. Ideal for athletes at different skill levels, these weighted baseballs enhance strength and endurance while preventing training plateaus. 2. Made with high-strength PVC and synthetic leather for impact resistance and waterproof performance. Durable for both indoor and outdoor use, reducing the need for frequent replacements compared to traditional plastic training balls. 3. Features an optimized non-slip grip for enhanced control and comfort during intense workouts. The textured surface prevents slipping, ensuring safe and effective power training for fitness enthusiasts. 4. Suitable for gym workouts, home fitness routines, outdoor group activities, and team sports. Supports core strength development for runners, swimmers, and ball game players through dynamic exercises. 5. Designed to target abdominal, back, and lower body muscles for improved stability and power. Helps athletes achieve fitness goals with progressive resistance training. Product Details: Specifications: Color: 9 Choices; Size: 22.86 cm / 9 in; Material: PVC and synthetic leather.