Ivanka on her father's hair - according to Wolff

Fire and Fury: Inside the Trump White House - Wolff-Michael Roth

"She treated her father with some lightness, even irony, and in at least one television interview she made fun of his comb-over. She often described the mechanics behind it to friends: an absolutely clean pate—a contained island after scalp reduction surgery—surrounded by a furry circle of hair around the sides and front, from which all ends are drawn up to meet in the center and then swept back and secured by a stiffening spray. The color, she would point out to comical effect, was from a product called Just for Men—the longer it was left on, the darker it got. Impatience resulted in Trump’s orange-blond hair color."