To stabilise Restube in the desired position. The positioning bar is pushed into the belt & ensures that Restube stays in the desired position on the back & does not slip. Easy stabilisation of Restube to prevent slipping.. The positioning bar can be used to stabilise Restube in the desired position. This is especially advantageous for long-distance swimmers to prevent Restube from slipping & the need of repositioning it.. Restube active already contains a Restube positioning bar