I'm really happy with my nothing ear opens.
Depending on your ear they might hurt under the helmet but for me its perfect. Personally its really important that the ear canal is open because of the elevation changes if the sound will cancel out at some point because the pressure gets too high.
The helmet inserts are also sweet heard only good things but its a bit expensive just to use for skiing.
Before the nothings i had sony linkbuds open but the nothings are way better.
I have your same issue, couldn't find any buds that would stay in, they'd fall with time or while I moved my jaw. I'm using the Sony linkbuds open, but since you need ANC you should have a look a the linkbuds FIT
I wore the Sony Linkbuds Open for a while until they broke. Terrible battery life but fit well and sounded decent. Bass is always an issue with open buds, however the Sony handled that well.
Moved on to Shokz Openrun Pro 2 and I love them. I often forget they are there. Sound is really good. No regrets.
Shokz bone conduction works well. My wife just got a set for swimming laps and I was impressed by how they don't block any outside noise at all. Sound quality is meh through this medium but nothing for this purpose is going to be (or needs to be) audiophile quality.
I've been using the Sony open donut-style earbuds for 4 seasons now. First the original LinkBuds and now the Linkbuds Open. They both do the trick but comfort is not great under helmet earpads after awhile, plus your ear shape can make it harder to keep them secure in your ears under a helmet. I've had them pop out in my balaclava every once in awhile.
I haven't tried the Shokz for any significant time, but I suspect they'd be the better option both for comfort and awareness.
ayo_ninja
