Harina hit the nail on the head. It can sustain so much abuse because they use Asian hair to create the wigs. Asian hair has the most cuticle layers and thus is the strongest most resilient hair on the planet with few exceptions. Which is why they exclusively harvest this hair for wigs (no matter what exotic name they give the hair, it came from east or south asia).
They can dye their hair blonde, go back to black, dye it again, back comb, sleep on cotton pillows, use hot curling irons or flat irons every day, use harsh sulfate shampoos and drying gels and hairsprays, never DC and still retain all their length with no effort. We've all seen it lol.
Conversely, our hair has less cuticle layers and tends to be much more fragile and extremely prone to breakage, we really have to take special care of our hair to retain length.
That being said our hair is extremely versatile in other ways, such as styling, it really holds the shape of textured styles much more readily then any other hair type and our coil pattern is very distinct and striking.
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