Featuring Gilbert's newly patented Triangular surface grip pattern, the G-TR4000 represents a major step forward in grip technology on training balls. Tests have shown that this new, more defined pattern is hard wearing and allows the player more surface area contact with the ball when handling. Hydratec technical fabrics and waterproof laminations have been installed to enhance the life and performance of the ball. The 3 ply poly-cotton and cotton laminate panel means that the ball will weigh slightly more. The ball will perform better on longer kicks and passes, and generally hold it's shape better than a ball of 2 ply construction. The durable rubber surface makes for a long lasting practice ball.