Hair4Real hair fiber carries equivalent charge. You know the same charge repel each other. Hair4Real fiber won't clump together on the head when they are sprinkled out of the bottle. Hence they don't cause itchiness.
2nd generation Hair4Real hair thickening fiber is from different powder shape compared with the 1st generation. The fiber is made slimmer, longer, softer, and lighter, in addition, the Hair4Real new bottle is specially designed: The sifter is made with the fine cone shape round holes, the fiber won't come out in groups, and come out with a proper amount. Therefore, it has better dispersibility, with every application fiber is saved, yet the effect is better.