The short hairs at the base of a hair topper, typically around 4cm long, are the “return hairs” — the back end of the individual strands hand-tied into the topper. These hairs help secure the strands to the base, minimizing shedding and enhancing durability. They also add volume and contribute to a fuller, more natural look, blending seamlessly with your natural hair. The length of these return hairs is carefully designed to maintain the stability of the hair, preventing hair loss.