Style 4 is kinky hair, which includes a tightly coiled curl pattern (or no discernible curl pattern whatsoever) that is usually fragile with an incredibly significant density. Such a hair shrinks when damp, and since it's much less cuticle levels than other hair styles, it is more susceptible to harm. https://mylescltah.p2blogs.com/35009408/hair-salon-in-ottawa-ontario-no-further-a-mystery