We have done numerous and meticulous tests and adaptations to make sure it is one of safest yet still challenging balance boards in the market.  The Sferaboard stands among the safest balance-boards thanks to its unique technologies that keep the SferaBall where it belongs: under the board. The raised edges on our board together with the unique closed stopper system, makes it just tip over to the ground when you lose balance making it easy to just step or hop off. The classic fall on the roll balance board (launching the board in one direction and your body towards the other) is practically impossible on the SferaBoard.