The problem I can see with LLB is the sizing. I don't know that they wouldn't *bind* a bigger guy but that it would be a challenge finding a size to fit. I would suggest that grey is a bit bigger for some reason. Anyway, I am on the autism spectrum and had to go to XL. I am 34C in the chest. They don't do a over the chest under the chest measure but I think that actually works out to their medium. I am really skeptical even if I weren't autistic that that would actually fit me. But maybe so.
They do have models with mesh backs.
BTW, I think they have 3 manufacturers. Maybe some run in different ways a bit. I have a Air M pullover made by Double T.
I notice a few of them run into the 5XL. How well they bind at this size-- I have no idea. I think it binds well but I am not that big.
https://www.youtube.com/channel/UCGfTMB8f1nYAvOcFRe4P5TA (Perpetual tomboy) on youtube does LLB and other binder reviews, and perhaps her response may be more typical than mine. She's not trans, at least not typically, has more serious chest dysphoria. She doesn't like the long ones, but I do. She also likes velcro, drives me nuts.
--Jay