This is a compact grip rosin bag designed exclusively for bowlers, made of durable porous fabric material filled with high-quality rosin powder. It effectively absorbs excess moisture from your hands, keeping hands dry throughout your bowling game. By reducing slippage, it greatly improves your grip on the bowling ball, enhances the consistency of your throws, gives you more precise control over the ball, and helps you achieve smoother, more predictable release. It is easy to carry, suitable for indoor bowling alleys and leisure bowling game rooms for both casual and professional bowlers.