The Bali's women downtime cottony wire-free bra is the best cotton bra. It is really hard to find a good cotton wire-free bra and this one delivers on all aspects. There is no irritating wire, but you still have good support. Plus it is cotton, so the skin doesn't get irritated by polyester or other synthetic fibers. I also used a couple of these bras while nursing ad they worked well (I just pulled the cup down).  I purchased the pink one for about $8, and you can't really find a better price.