Undercutting long hair refers to a technique that involves creating shorter layers near the nape of the neck, while leaving the top layers long and usually straight. This style gained prominence in the punk subculture of the 1970s, and it remains popular today, favored by various celebrities and fashion icons.
Undercutting offers multiple benefits, including reducing hair weight, making it easier to style, and adding a touch of edginess to one's look. Moreover, the contrast in lengths creates a visually striking effect that can accentuate facial features.