I tend to get sweaty right there, so it's a great idea. A sweat vent. How functional!
PS BTW S/O that other thread...I had to go to the mirror to check where my boobs sit relative to my elbows. It's not good news, folks.
I don't get it. I mean, I don't have big boobs, so maybe I am missing something, but isn't the alternative pushing them all the way up to your chin? I still think study's boob positioning looked fine. lol