Breast firmness and perkiness depends mainly on two things: breast skin and Cooper’s ligaments. Together these two connective tissues help to maintain the shape and structural integrity of your breasts. Skin supports and keeps breast lifted from the outside, while Cooper’s ligaments (also known as the suspensory ligaments of Cooper or the fibrocollagenous septa of the breast) keep breast lifted from the inside. Younger breasts also have a higher proportion of breast tissue, as opposed to fat, and that also helps add to breast firmness by maintaining ‘turgidity’…