I actually use a the sports bra compression bra made for females from underworks, because i couldn't stand not being able to breath while running, hiking, etc. I'm an ex cig smoker (smoked for 7 years, mostly quit for a year now) and I need to breath, damn it. How breathable are the tri tops and the full tanks from Underworks, would you say? I got a velcro style binder from Tranzwear and I felt like  I was suffocating and wanted to claw my skin off in that beastly contraption. But the compression bra doesn't get me all the way flat, mostly but there's still a little something visible.  I'm only a 37 C so yeah.

I am having no breathing issues with my 997s, even the one that's a little too small. I don't know if it's because I have extra strong trumpet player lungs, just the I'm built, or what.

I find that in the cotton concealer tank from underworks I have no breathing issues at all. I was a tuba player and ex smoker, and Im really sensitive about things being too tight around my ribs, but I can comfortably wear my underworks binder with no issue.

Thanks for all your responses guys, i will look to get myself a tshirt style one next week.

In terms of breath ability, i find my underworks tri top is fine, the only time i have problems is if it rolls up under my chest, can get quite tight but thats the only problem i have with it

Thanks for posting those photos. If been thinking about trying this as my first binder but I'm not small either so I wasn't sure it would be worth it. I'm going to give it a go now though - if the results are as good as yours I'd be delighted.