The North Face Lichen Daypack Mars Dust Dark Heather Mars DustEndorsed by the American Chiropractic Association, the Lichen Daypack delivers simplified organization, which makes it perfect for school or work. FEATURES The FlexVent suspension system, certified by the American Chiropractic Association, has articulated shoulder straps, a rounded back panel, comfortable stitch lines and soft touch chemise fabric Vertical center front zipper for easy access to smaller items Large, zippered main compartment with a