I already wear the Giro Aeon helmet, and it's great. Light, comfortable, airy. Good safety record. But, the Synthe MIPS sounded so much better, especially in the safety category. The sexy marketing videos made it seem like so much R&D went into the thing, it would be worth coughing up $270 in the name of advanced head protection. Oh, and then there's the single handed dual adjustments. And, the great glasses ports designed right in!
Single handed dual adjustments? The button twist adjustment work fine to tighten the liner to your head size. But, how to adjust the tilt? I called Giro to learn how to get to that second adjustment, one handed, but it does not work that way. Somewhere inside (the Giro lady was unable to explain it) is a tab that pulls out or pulls up, or something. Definitely a two handed operation...with the helmet off.
And, how about those specially designed ports for your sunglasses to fit into? A cool idea, right? Not so much...These are little vents on the sides of the helmet in the front. First of all, the ports are very difficult to locate when you are trying to stick your glasses arms through. But DON'T BOTHER! They don't fit in, anyway! If you have Oakleys like I do, the glasses stick out about 3 inches from the helmet, due to the shape of the glasses arms. So much for aerodynamics, not to mention security of the glasses, not to mention them bobbing up and down over bumps (I would imagine. Just jumped up and down in the house, as I'm planning to return them).
I'll save you my comments about the tight chin clip, and the color schemes. I think you get my overall drift. I think the Synthe MIPS helmet will be great---but not yet. Giro needs to send 'em back to the lab for rework.
Ride safe, everyone!