i wear a 40" D+ cup and it's damn hard to find all-cotton "strappy" bras that don't look like I'm wearing an iron maiden under my lacy strappy tops.  And i can't wear anything but cotton, it makes my skin literally crawl after a while.  these are surprisingly supportive, although i won't be doing any jogging in them, and very comfortable.  and they actually fit.  I don't know how long they'll last, but they are for special occasions, not everyday.  two thumbs up.  can't beat'm for the price either ($11 when i bought the 3 pack).