The phrase "air moist" means that the air has a lot of moisture or water vapor in it. This can make the air feel damp or humid.
Sentences with «air moist»
Keep Air Moist: Humidity reduces irritation and loosens up mucus. (mamanista.com)
Cool mist humidifiers usually emit a cool mist that can easily get rid of air allergens, by keeping the surrounding air moist. (twinmom.com)
The answer to your predicament is to acquire the best humidifier for your baby and put it in the baby's room to help keep the surrounding air moist and cough free. (intelligentmother.com)