North Face backpackALWAYS READY. We gave our much loved Jester backpack an update: we've increased its recycled content, simplified the internal organization and it can now stand unsupported. Oh, and it's proudly endorsed by the American Chiropractic Association. FLEX VENT TECHNOLOGY. Our FlexVent suspension system features a flexible yoke built from custom injection molded and flexible shoulder straps, a padded mesh back panel and a breathable lumbar panel for