The MET Estro bike helmet is a versatile road helmet. With its good internal fit, the helmet fits almost all types of head shapes - round, oval, or otherwise. With its 26 air holes (17 that take in air and 9 that let the air out) it is possible for the riders to keep a cool head when cycling. This model is equipped with MIPS-C2 which gives you optimal head protection. The helmet is also equipped with Safe-T Upsilon Fit which gives you a good fit.