The stillsuit typically covered the entire body, up to the neck and wrists. For the hands, gloves could be worn. However, when delicate work was performed, Fremen discarded the gloves and rubbed their hands with leaves from the creosote bush. This allowed them to work, while the residue from the creosote leaves prevented perspiration. A facial mask could also be worn so that moisture from the mouth and face could also be reclaimed. As the planetologist Liet Kynes is assisting Duke Leto Atreides I with the fitting of his stillsuit, he explains the suit in this manner: