The North Face Recon Pack - Asphalt Grey Emboss FlexVent injection-molded shoulder straps with a top layer of Atilon foam for added support and bottom layer of PE foam for added comfort Comfortable, padded Airmesh back panel with Spine Channel and PE sheet for extra back supportIntegrated reflective light loop Winged, stowable hipbelt Large main compartment with laptop sleeve (fits most 15" laptops), organization and hydration portSecondary compartment with organization Endorsed by the American Chiropractic Association (ACA)