The TRX Slam Ball 30 lb / 13.6 kg is engineered for high-impact training, perfect for functional and strength workouts. Its sand-filled core eliminates bounce, allowing for intense slams and throws to boost strength and flexibility. The textured rubber exterior ensures a no-slip grip, enhancing workout efficiency. Crafted with a double-walled interior, this slam ball withstands repeated impacts without deforming, making it a durable choice for any fitness enthusiast. Its 60-Durometer rubber offers comfort during heavy use, while the bounce-resistant design ensures safety and control during exercises. Ideal for both strength and cardio training, the TRX Slam Ball challenges your body on multiple levels. It's a versatile tool found in gyms and sports clubs, offering a unique way to elevate your workout routine. Note: Not suitable for use on concrete or pavement.