The Dressing Comb (2 inches tall x 7.6 inches tall) is best for everyday use on all hair types. Great for styling, cutting and daily grooming. Reduces frizz, glides through hair easily, ergonomically designed. Combs are sanitizable: feel free to wash this comb in warm water with antibacterial soap. Does not leave reside on hands. Package will secure oil and keratin for 3 years; once opened, the keratin and oils very slowly evaporate over time.