4-5 hrs. I air dry loose with the scarf method. The back center is last to dry. If I braid my hair it takes 6-7 hrs max. I ONLY air dry and have done so exclusively for many years. I love it. I go to sleep with a towel on my pillow, my hair lays out on it (side sleeper), and it dries well and pretty straight that way. I bun mostly anyway even if it doesnt dry straight (texlaxed).