MIPS is of minimal effectiveness on standard bicycle half helmets, because they often do not fit real tight, and are able to move or spin a little anyway. On full face enduro and downhill style helmets that fit tighter it is more needed and more effective. On motorcycle and race car helmets, MIPS and the even more advanced ODS systems, it is something can can make a huge difference. Supercross racers started using the ODS helmets back in 2013. The heavier the helmet, and the tighter the fit, the more effective these systems are.