Are you sure we're all 4b? I'm see a little curl action on the sides you can fit a pencil through. But in the back we stay tight and springing. Plain ole confusion in this joint. You may need to re-evaluate this. At least we are sure about the normal porosity part of things.
About my hair:
weekly shampoo-HE Honey I'm Strong
daily conditioner-HE Honey I'm Strong (use as li)
go to style-Pocahontas braids