Although the Togu-seat ball (65 cm) makes a high-quality impression, but unfortunately a definite problem: The ball is greatly while sitting after. Is the seat height at the beginning ergonomic fit, we bagged the passage of time more and more deeply. The ball is also after more than an hour even after and is starting to take an egg shape. After an hour, I have more than 10 cm sitting lower than at the beginning. It takes just as long until it returns to its original round shape again. A stronger inflation does not help either, because then you start sitting much too high. FYI: I am 175 cm tall and weigh 67 kilograms'm so not a heavyweight.
Since the seat height varies greatly at this ball, he is not to use in my opinion as sitting ball, although the manufacturer offers him to sit. The anti-burst system is certainly a good thing, but does not weigh on this issue. On the positive side, the Togu-seat ball hardly smells and the material is very sturdy. Due to the unstable seat height I have returned the ball, however, because I want to sit on a ball sometimes an hour or two.
