Except for competitions with exceptions (Kona...), no.
I contacted MET and they said no.....
They have CE (world save US), not the US approvals.
Sort of too bad for us...it was a fast helmet if you kept in position for broad shoulders...wish other vendors focused on the broad shoulders too (and were fast)....not sure if the aerohead is but given the suggestions here it probably is actually faster than the MET anyway.
My plan is to train in the head with a terribly hot helmet. Get acclimated...and then see what happens.
Have the following helmets and have tested them on the same bike with the same clothing with the same wind conditions just going downhill in the same hand position. Head down but not turtled. Exact same hand position on the bards. Fingers too...same position.
All data based on 2 descents, gps speed via wahoo bolt.
The V is my "terminal velocity" - it is not a very steep hill, a roller if you will. Temp was 92F. Humidity 100%. Wind under 2mph. Brutal in the sun. Start at the top of the hill is exactly at 21.0mph in a steady state. This is the best I can afford to do.
Ballista: 28.9, 29.2 "cool, quiet, very light" Oakley evzeros.
Giro Aerohead Mips: 30.1, 31.0 "hot and moist, quiet, heavy" Visor
Giro Vanquish 29.5, 30.5 "cool, quiet, neutral weight" Visor
Kask Bambino Pro 29.9, 30.6 "hot and moist, quiet, very light" Visor
Specialized S works TT 32.5, 33.1 "medium, very loud, very light" Oakley evzeros (no plan to use the visors)
N of 1 data. My shape is not your shape. One person. Trying to be fast and "the same" but who knows....if a few mm up or down on the saddle nose...
I am moving to a mostly two helmet plan for tt's: Super hot race and training: Vanquish with visor. Racing (if it matters): The S-works TT. Acclimation training, the S-works so at least 1-2x a week with it. For me, my position, and my needs, this is the best set of options. For a triathlete the S-works is not trivial to get on/off, but with practice it can be done quickly. For me, the lightness and sans visor coolness trump the hastle. And I have big ears. Went with light colors on the Vanquish (white) and S-works (silver). Probably does not matter, but overheating for me has been an issue in the the aerohead mips in black.
I had the P-09 in the past and the post-recall ones got fat.
I was really surprised the S-works, an older design, was just so much faster at least for me. I have broad shoulders and a flat back and have had a racing license for a long time.....my focus is TTs. Perhaps there is not a lot left to gain since 2012....the s-works people certainly did a great job. McClaren too.
I was also surprised that if I had my head up, most of the helmets slow you the same/ a little but the aerohead seems to just kill your speed. Did not measure this well, but if your position is not head down now, the aerohead might be a really bad choice for some based on this N of 1.
The Ballista looks a lot nicer than the vanquish, so I plan to keep it for social events like team rids and hill training in groups. It and the evade are much nicer looking for road racing. The Vanquish is growing on me.
The Bambino is the nicest in quality followed by the vanquish. The S-works is a little rough around the edges, literally. And it is newest in terms of ownership.
The aerohead is too heavy and hot for my liking...if they lowered the weight and got more air into it....maybe. The Scott at the TdF that was camouflaged at the TTT was perhaps this kind of option.
The noise of the S-works is like a disk wheel's noise...it makes you feel faster maybe too. At least how it makes me feel. Good luck.
I have no conflicts to report. Just an old bike racer with a day job.