Abstract: A hair sleeve for maintaining a collection of the free end portions of a user's hair in a substantially dry state. The hair sleeve has a flexible and substantially waterproof body that extends from an open end to a closed end. The body defines an interior cavity that is sized for receiving the collection of free end portions through an opening in the body. A closure assembly selectively constricts the opening against the rooted portions of the user's hair to seal the collection of tip portions within the interior cavity, leaving the user's scalp exposed for washing.