Someone asked in another thread what the difference between a 3c and a 4a is. I can't precisely quantify it, but I think that this is a lot of what makes the difference. The malleability of the hair and the relatively easy ability of it to take on VERY different looks from kinky to curly and even wavy depending on the type of 3c. 3bs have this characteristic too, but I think it's more pronounced in a 3c. My hair looks very different depending on what I decide to do with it that day.