You come to the trailhead fully prepared, you expect the same reliability and readiness from your packand the Aether 55 delivers. Custom Fit-on-the-Fly?Shoulder Straps, Hipbelt and an adjustable torso provide a near-perfect fit while an injection-molded backpanel offers close-to-body performance. Made with bluesign-approved nylon and PFC-free DWR. Raincover included.. . ?. . . CUSTOM FIT: A Custom Fit-on-the-Fly Hipbelt, Custom Fit-on-the-Fly Shoulder Strap and adjustable torso length allow for a fine-tuned fit for a variety of body shapes and sizes.. AIRSCAPE SUSPENSION: An injection-molded, die-cut foam AirScape?backpanel creates a breathable, close-to-body fit.. LOAD CAPACITY: Designed to provide a stable close-to-body carry; ideal for managing heavier loads when the trail gets technical.. SUSTAINABLE MATERIALS: Constructed with high-quality bluesign-approved nylon and PFC-free DWR.. Included raincover made with PFC-free DWR and bluesign-approved materials. Large front panel zip access to main compartment. Floating top lid with lash points. Fabric reinforced front shove-it pocket. Large dual-access stretch mesh side water bottle pockets. Dual upper/lower side compression straps. Dual front panel compression straps with StraightJacket compression. Dual zippered hipbelt pockets. Dual ice axe loops with bungee tie-offs. Zippered sleeping bag compartment with removable divider. Removable sleeping pad strap. Internal hydration reservoir sleeve. Anchor loops for an optional Osprey Daylite?daypack for short forays. VOLUME:?S/M?3356 IN3 / 55 L ?L/XL?3539 IN3 / 58 L. WEIGHT:?S/M?4.827 LBS..L/XL?4.871 LBS... DIMENSIONS:?S/M?30.71H X 14.96W X 9.84D IN.?L/XL?32.68H X 14.96W X 9.84D IN.. MAIN: bluesign-approved 420HD nylon packcloth, PFC-free DWR. ACCENT: bluesign-approved 210D nylon Diamond, PFC-free DWR. BOTTOM: bluesign-approved 420HD nylon packcloth, PFC-free DWR. Imported.