Profi Latex is the highest grade latex available on a goalkeeper glove. Profi is a match tier latex only, and not recommended for use in training.
A typical Profi latex glove will only have a lifespan of approximately 10 - 15 games at Prime Grip Level. Although you do sacrifice an element of durability, the latex is unbelievably grippy. You will not find a better latex on the market for grip levels.