I stopped wearing wired bras a long time ago and bralettes are all I wear now. I wanted something more breathable than the cheap, polyester ones that I have. Ruby feels well-made, although a bit thick, so I'm not sure about breathability during warm weather. The issue for me was the fit. I'm a UK10/34B on tops, but the band on the Small was too tight for my liking. The next size up was out of stock on the orange, Veronica print, so I exchanged it for a racerback Iona in a Medium and that feels a lot more comfortable. My advice: size up!