Perhaps check out the "AIR" series? They are relatively new though, so I am not sure how well they work. Not sure about the size of your chest, but generally from reviews I've seen of this brand (Double) it appears that it works better for those who are more of an A through smallish C range.
http://www.lesloveboat.com/shop/product_info.php?cPath=83&products_id=278 🔗 [Link: lesloveboat.com/shop/product_info.php/]I have this Juya brand binder:
http://www.lesloveboat.com/shop/product_info.php?cPath=57&products_id=127 🔗 [Link: lesloveboat.com/shop/product_info.php/]It is made of one layer of fabric on the back and two (i think?) on the front which binds me very well, and I live in FL and don't find it to be uncomfortable during the summer humid torture. My chest average is about 32.5" so I got a M. I really like this binder. The only thing I don't much like to do in it is work out, because my range of motion in it is a bit restricted when I want to do things like pull-ups, and I get annoyed when it is obvious I am wearing the binder. For daily activities, however, it is absolutely fine and the "restrictiveness" which occurs when I am working out is actually what makes me feel secure in it when I don't (if that makes sense).
If you need any clarification or such just ask.
