I have tried so many bras for the high heat and humidity of summer in the midwest over the years. I cannot stand molded cups or padding, especially when it's hot and sticky out. This bra is a winner! The fabric, which I thought might be irritating to sensitive skin, is actually incredibly comfortable and extremely lightweight. The cutout also allows breasts to hang naturally without a shelf effect but with a better amount of support than I expected. I was hesitating because of the price but this ended up being PERFECT! 40C = sz5