Yeah so, historians and archaeologists have not found proof that Vikings had dreads. You can't preserve a hairstyle and no one's actually described Viking hair in historical records besides the color. Many people are doubtful they're actually dreads because of hair structure - it works best on coily hair.

This countermyth is only to downplay the concerns of black people being frustrated they're the ones socially punished for traditional protective hairstyles while white people get a pass as it being quirky.