Winner of the 2021 Backpacker Editors’ Choice Gold Award. You come to the trailhead fully prepared, you expect the same reliability and readiness from your pack—and the Aether 55 delivers. Custom Fit-on-the-Fly® Shoulder Straps and 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.Key AttributesCUSTOM FITA 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 SUSPENSIONAn injection-molded, die-cut foam AirScapeTM backpanel creates a breathable, close-to-body fit.LOAD CAPACITYDesigned to provide a stable close-to-body carry; ideal for managing heavier loads when the trail gets technical.SUSTAINABLE MATERIALSConstructed with high-quality bluesign®-approved nylon and PFC-free DWR.Features 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 Carry InformationAIRSCAPE BACKPANEL Injection-molded, die-cut foam AirScape™ framesheet maintains comfortable back contact with ventilated airflow channels and maximum stability for carrying heavy loads Mesh-covered foam lumbar for supportive, lightweight and comfortable contact surfaces CUSTOM FIT-ON-THE-FLY SHOULDER STRAP Custom Fit-on-the-Fly Shoulder Straps allow for a precise shoulder wrap and fit Spacer mesh fabric provides a soft and comfortable contact surface CUSTOM FIT-ON-THE-FLY HIPBELT Extendible Custom Fit-on-the-Fly Hipbelt offers a precise fit for varying waist sizes Incremental length and angle adjustments allow for a fine-tuned fit Crossbody ErgoPull hipbelt pulls weight into lumbar when hipbelt is tightened ENHANCED LOAD TRANSFERThe Custom Fit-on-the-Fly Hipbelt integrates the LightWire frame into the adjustment system—creating a better distribution of weight and, in turn, a better carrySpecs LOAD RANGE: 30 - 60 lbs. S/M: VOLUME: 3356 IN3 / 55 L DIMENSIONS: 30.71H X 14.96W X 9.84D IN. WEIGHT: 4.827 LBS. L/XL: VOLUME: 3539 IN3 / 58 L DIMENSIONS: 32.68H X 14.96W X 9.84D IN. WEIGHT: 4.871 LBS. FABRIC: 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