I’ve tried a bunch of binders over the years, and my current favorite is a gc2b tank binder, but it’s a little clammy in hot weather. I’ve mostly been getting by with cotton sports bras at a band size two inches smaller than my actual size, with a square-cut, loose overshirt to disguise the lumpiness. That’s good enough for a quick trip to the store, but I think have an excuse to buy a new one. (Never mind the… uh… several others in my closet, lol). Any recommendations?
Seconding tape! I have what’s considered to be a larger chest but mine are not very dense. I’ve noticed that helps me a lot with getting my chest to look right with trans tape. From what I’ve heard/seen online, tape is harder to use if you have denser chest tissue.
The other thing I do in hot weather is wear a moisture wicking under shirt under my binder. It helps a lot with general sweat and making sure things aren’t too swampy under there. I like the Uniqlo Airism shirts, but anything moisture wicking and thin will work great.