How hair fibers work
Thinning hair looks thin mostly because of contrast: light scalp shows between strands. Fibers reduce that contrast by making each strand thicker, so less scalp shows.
1. Static charge
Fibers carry an electrostatic charge. Shaken over hair, they're attracted to the strands and wrap around them, much like lint on a sweater. That's why fibers need dry hair: moisture kills static.
2. Optical thickening
Each hair can pick up dozens of fibers, increasing its apparent diameter. Ten thicker-looking strands cover far more scalp than ten fine ones.
3. Color matching
Fibers are dyed to match common hair colors. When the shade matches your roots, the fibers read as your own hair. A shade that's too light reads as scalp, so when in doubt go darker. See our color guide.
4. Holding sprays
A fiber-holding spray adds a light film that bonds fibers to hair, improving resistance to wind, rain and sweat.
5. Washing out
Fibers rinse out with shampoo. Because daily users wash every night, scalp health matters. A ketoconazole shampoo like Regenepure DR helps keep fungus and dandruff from building up.
Limitations
- Need existing hair
- Don't survive swimming
- Can transfer in heavy rain or sweat
- Cosmetic only, with no effect on hair growth