Primal Strength Anti-Burst Slam Balls are designed to be used to improve core strength. The heavy duty, anti-burst Slam Ball has a thick rubber dimpled textured exterior, offering more grip and protection for the slam ball. The Slam Balls are filled with silica sand, ensuring they don’t bounce and allowing for greater control during workouts. Slam Balls are an essential functional training and conditioning tool for any gym, sports facility, boot camp or PT studio. Athletes are incorporating Slam Balls for explosive, power work and trainers are incorporating them to offer multiple fitness benefits for their clients, from core work to full body workouts when slamming the ball from overhead. The Primal Strength Anti-Burst Slam Balls come in sizes from 3kg – 20kg. They are fully backed by a 12 month commercial warranty. Upgrades include: Outer wall thickness improved by over 30%. This takes the rubber weight to a minimum of 1200g. The tyre grip has been reduced and the outer wall thickened