When I crashed in October, I damaged my Giro Synthe MIPS, but escaped any head injuries. That gave me continued positive vibes about Giro helmets. Combined with the fact that Giro offered a 30% discount on any helmet as a crash replacement, I went with a Giro Vanquish MIPS. Its ventilation is probably not the best, and this test says it's not as aero as others in its class, but I like the visor. I haven't seen direct comparisons about the net power savings of helmets with visors, but I' sure it's beaucoup watts (jk).

Truly? I doubt that an aero helmet makes much of a difference, but what the heck, right?