These flat balls are actually way cooler than they sound! You get a set of 6 made from synthetic rubber with a two-layer design that's flexible yet durable enough for everyday use. They're small and lightweight, making them super easy to carry around and store when you're done. The real magic happens when you use them for training - as they roll, you can actually see from their path whether your swing is right or not. It's like instant feedback for your technique! They're perfect for both indoor and outdoor practice sessions. The synthetic rubber material gives them that perfect balance of flexibility and durability. Whether you're working on your golf swing, baseball throw, or any other sport that involves swinging motions, these little guys are incredibly helpful training aids. They won't take up much space in your gear bag, and at about 220 grams total for the set, you barely notice you're carrying them. Seriously, if you're looking to improve your swing without breaking the bank on fancy training equipment, these flat balls are totally worth trying out!