It's a soft 100mm stage ball with a very special feature which is a result of an intense research work: 1/3 of its internal volime is filled with a special liquid silicone. The barycentre is low and the ball comes to be super stable on high throws and easy for foot cactches and head rolling/balancing. The principle is similar to the Russian balls although it'a very different ball. The liquid silicone, unlike any kind of grain, slides perfectly inside the ball so that even when the ball is thrown with a spin it dowsn't wobble in the air.
Moreover the silicone is injected through a very small hole allowing us to use an almost invisible plastic tapered pin as a plug. (Note to curious jugglers: although the plug can be extracted and is extremely hard to push into the ball, you should not force it inside otherwise you will not be able to recuperate it).
This special liquid silicone is totally non-toxic (normally used in the food industry as a lubricant) and therefore totally safe.
The outer shell of the ball is rotary molded much like our stage balls with a ″deep thoat″ that holds the plug firmly in place.

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