outer root sheath
{{Short description|Region of the hair follicle}}
The outer root sheath or external root sheath of the hair follicle encloses the inner root sheath and hair shaft.James, William; Berger, Timothy; Elston, Dirk (2005) Andrews' Diseases of the Skin: Clinical Dermatology (10th ed.). Saunders. Page 8. {{ISBN|0-7216-2921-0}}.
It is continuous with the basal layer of the interfollicular epidermis (skin).