I have porous hair and have my routine down enough to get 2nd, 3rd, and 4th day hair, though day 4 is often an updo. I always use a sleep cap and go heavy on product on day 1 if I'm in a mood to go 4 days. I also am strict about sealing.
But, with the extra low dew points right now, 2-3 days is more preferable than 3-4.
Med/Coarse, porous curly.