My hair gets poofy for a day or two after I wash it, and extra frizzy when it is really humid. I think my hair just likes to poof in general. The only time is isn't poofed is if I put a ton of conditioner into it to weigh it down or just before it gets to the point of being really greasy between washings. And even then, there's still some frizz.

24/24/30 inches
2c N iii
never dyed