Properties: The SLAM BALL is a highly durable ball made of thick, soft rubber, filled with synthetic sand, designed for dynamic impact on the ground. The ball is used during intense CrossFit training. It is made entirely of rubber, which makes it much better and more practical than the leather versions, which often have cracked seams. The ball is waterproof, so you can also train with it outdoors. Specially selected rubber combined with a sand filling prevents the ball from bouncing off the ground. The entire surface of the ball has protrusions formed into a non-slip tread that makes it easier to grip the ball, ensuring precision of movement and comfort even during very dynamic exercises. The balls come in different weight versions. Beginners will appreciate the balls in versions from 2 to 10 kg, Slam ball training is a popular and very effective way to increase endurance, speed and power. Training with balls involves a large number of muscle groups. This type of training is recommended to improve overall physical fitness, especially explosive strength, which is a key element of combat sports and other sports based on speed and dynamics. Technical data: - material: rubber - filling: synthetic sand - color: black - weight: 8 kg - diameter: 25 cm;Properties: The SLAM BALL is a highly durable ball made of thick, soft rubber, filled with synthetic sand, designed for dynamic impact on the ground. The ball is used during intense CrossFit training. It is made entirely of rubber, which makes it much better and more practical than the leather versions, which often have cracked seams. The ball is waterproof, so you can also train with it outdoors. Specially selected rubber combined with a sand filling prevents the ball from bouncing off the ground. The entire surface of the ball has protrusions formed into a non-slip tread that makes it easier to grip the ball, ensuring precision of movement and comfort even during very dynamic exercises. The balls come in various weights. Beginners will appreciate the 2 to 10 kg versions. Slam ball training is a popular and very effective way to increase endurance, speed and power. Training with balls involves a large number of muscle groups. This type of training is recommended to improve overall physical fitness, especially explosive strength, which is a key element of combat sports and other sports based on speed and dynamics. Technical data: - material: rubber - filling: synthetic sand - color: black - weight: 7 kg - diameter: 25 cm;Yakima Slam Ball PRO 4kg Medicine Ball 100421 Properties: The ball is used during intense CrossFit training It is made entirely of rubber, which makes it much better and more practical than the leather versions, in which the seams often break. The ball is waterproof, so you can also train with it outdoors filling: synthetic sand color: black weight: 4 kg diameter: 25 cm