Smallest IEM with foam tips?

[gohanssjn]

Hello all.
 
Looking for the smallest profile IEMs I can with foam tips.  These will be used under a motorcycle helmet, so being able to slide it on while they are inserted is key.  I currently use some Shure SE310 and they are a bit difficult to keep on when putting the helmet on.
 
And to stave off some off topic discussion: they are legal to wear riding in my state and I listen at a very low volume so I can still hear cars and sirens.  I mainly just want to cut wind noise and hear some music on my commute
 
Thanks!

 

[Mython]

Etymotic ER4 springs immediately to my mind:
 
 
https://www.etymotic.com/consumer/earphones/er4.html
 
 
 
Also consider Klipsch:
 
http://www.head-fi.org/t/787530/klipschs-new-line-of-reference-x-iems-x6i-xr8i-x12i-x20i