Each time a hairbrush glides through hair, one or two strands often stay behind. These strands catch on the stiff nylon or boar bristles, looping loosely or pressing flat against them.
Brushing happens daily, sometimes multiple times. With each pass, fresh strands join the ones already there, settling into the same narrow spaces between bristles.
Over weeks of regular use, the bristles hold dozens of these strands. Some lie straight and parallel to the brush base, while others curl and overlap, forming thin layers across rows of bristles.
The accumulation fills gaps that start empty after cleaning but gradually reclaim space. Strands from different lengths and colors intertwine, creating a subtle density in the brush's interior.
This steady addition continues brush after brush. The core of the hairbrush now cradles a growing collection of hair, quietly expanding without any sudden fullness appearing.