2. Mechanical testing (estimated time required: 1 hour) A small device will be applied with the surface of the skin at several locations on the breasts. A mild suction will be applied for several seconds for each measurement. This will measure how the skin tends to stretch. The instruments used are very sensitive and provide the information needed with very small, painless amounts of movement in the skin. In addition to evaluating characteristics of the breast skin, one additional measure will be taken on the skin at the front of the forearm area to help understand your general skin qualities.