Deep v neckline

A type of neckline. Deep necklines are usually found on female garments, to emphasis cleavage

the edge of a woman's garment at or below the neck, used with reference to its height or shape.

The neckline is the top edge of a garment that surrounds the neck, especially from the front view. Neckline also refers to the overall line between all the layers of clothing and the neck and shoulders of a person, ignoring the unseen undergarments.

For each garment worn above the waist, the neckline is primarily a style line and may be a boundary for further shaping of the upper edge of a garment with, for example, a collar, cowl, darts or pleats. In that respect it is similar to the waistline and hemline.