This is so comfortable because it doesn't have underwire but the cups allow you to create cleavage. I ordered the green floral and black one. I recommend the green floral one to totally hide that the top has cups. The black one showed the cups so when I went to create cleavage you could see the cups... and my nips pushed too close together. You cannot adjust the straps or the back but it is stretchy to work with your size. I like how the straps can sit closer to your neck to almost look like a halter from the front or further out on your shoulders. It is very flattering and secure. I can tell this suit will stay on in the ocean. I am 5'5" and 108lbs and a small B32 and the regular XS fits perfectly. It doesn't have much room for a larger chest because the straps are snug and do not adjust. To compensate you would have to lift your chest to create cleavage or you would see underboob if worn regularly. I recommend the green floral to hide either action. It is a very sexy and beautiful top