1、Impact Resistant Materials: The core is covered with synthetic rubber, the outer layer is imported synthetic resin material, and the thermoplastic artificial resin material has better impact resistance. 2、High Elasticity: The interior features a soft, single layer design with a high energy elastic core that increases ball speed. Soft and easy to rebound, durable, strong and durable, long service life. 3、Golf Training Helper: It is the ideal indoor practice sports training ball for golf lovers. You can enjoy exercise anytime, anywhere at home, in the gym, in a hotel or on the go. 4、Portable: The golf putting practice ball is small in size and light in weight, which can be placed in your pocket or bag at will and is very convenient to carry. 5、Ideal Gifting: This golf putting training ball is a perfect gift for golf enthusiasts or novices, which can be used to warmming up or help with training. Item Type: Golf Ball Material: Synthetic rubber coverd core, synthetic resin outer layerGross Weight: 230g / 8.1oz Wind Tunnels: 342 5 x Golf Ball