Not all swimsuits have adjustable shoulder straps - this is one of the main features of a long torso swimsuit. One-piece swimsuits with adjustable straps will give you the ability to adjust the height of your neckline and lift up or lower your bust line, as well as provide support for full-figured women. This also allows you to tighten or loosen as needed. Regular one-piece suits do not offer this feature - they are usually designed to fit only one figure.