What I would call a knock-off is a vendor that sells u a skull cap and tells u to go to the Hair Room with it and grow some hair on it lol it's not something modelled and textured, so it's not going to have a geometry. That's what some hairs do lol Dynamic hair is different, the geometry looks like a starfish but when applied gravity it would look like strands of hair resting on top of your model's head.