His mouth was not masked, though. Fremen-wise, he sensed his body’s moisture being wasted with every breath. Leto brought a section of the membrane over his mouth, rolled it back when it tried to seal his nostrils, kept at this until the rolled barrier remained in place. In the desert way, he fell into the automatic breathing pattern: in through his nose, out through his mouth. The membrane over his mouth protruded in a small bubble, but remained in place. No moisture collected on his lips and his nostrils remained open. The adaptation proceeded, then.
