Marcelo 5 I practice futevolei since 1995 in Rio de Janeiro. After using various brands and types of ball, the Mikasa FT5 was adopted as the sport's official ball. However, this ball, in addition to being very hard, loses its outer protective film very quickly causing it to absorb sweat and water from the ball, becoming extremely heavy. 5 years ago, I discovered the Mikasa MC5 CR, used at JUFA. Despite costing 3 times more than the FT5, it lasted 10 times longer without losing its features. Ideal weight and very resistant. Now I bought the FT55B at amazon jp which seems to me to be an evolution of the MC5CR. I've already started using the new ball and it seems perfect for the sport as well as an external protection equal to or better than the MC5CR. I hope to use this ball for many years to come before it loses its characteristics. It's really worth buying this ball!