People with type 2 hair have natural waves, but again, there are a few variations. For example, 2A hair is fine and has somewhat of a just-got-out-of-bed look to it, while 2B hair contains an S-shaped wave that can't be straightened with heat tools as easily as 2A hair can. 2C hair is a bit thicker and bouncier, and the wave often starts at the root.