Racerback bras have straps that go from the center of the back and then angle in over the shoulders. With their Y- or T- shapes, they keep straps from slipping or showing under tanks or sleeveless tops. Front-close style racerback bras add the convenience of fastening in front, making them popular in sports bras, which usually have several fasteners.
You can also find the racerback front-close construction in almost any style, including contour bras, push-up bras and soft-cup bras. Between the smooth back provided by having the fasteners in the front and the added back support offered by racerback bras styling, these bras can be comfortable to women in a wide range of sizes.