Gregory Kalmia 60

Backcountry.com says:
This large pack is our choice for long backpacking trips for a plethora of reasons. The back panel is suspended with ventilating mesh to increase breathability and treated with bacteria-fighting Polygiene to prevent odor buildup. The hip belt and shoulder straps rotate with our bodies to mimic their natural movement during the trek. There's a wide variety of storage options and entry points, so organizing our packs and accessing our gear has never been simpler.