We're working out what we think - we'll add our view here!
Marmot says:
Training day? Get fast and light in the highly breathable Aero Tank. This lightweight performance tank is built with a quick-to-wick and dry fabric and jacquard mesh paneling. This movable top has flat-locked seams and a scoop neck.
We're working out what we think about Marmot's Womens Aero Tank Top, we'll add our comments here in due course.