Comfortable bicycle helmet with good ventilation The Giro Radix MIPS bicycle helmet combines a rigid appearance with robustness and comfort. It offers protection and ventilation with a low weight at the same time so that you can ride comfortably and confidently. With the Roc Loc fit and MIPS system you can easily make adjustments to the fitting, as well as be sure of sufficient protection. Mips technology, what exactly is that? The Mips bicycle helmet has the well-known MIPS technology. MIPS stands for Multi-directional Impact Protection System. This technology protects the cyclist against rotational forces that are released during a fall. So you not only have a very nice bike helmet, but also a very sturdy bike helmet that offers ultimate protection.