Osprey Atmos AG 50 Backpack (2026)

The Osprey Atmos AG 50 is built for weekend warriors and lightweight thru-hikers who refuse to sacrifice comfort. At its heart is Osprey's acclaimed Anti-Gravity™ suspension: a continuous panel of 3D-suspended mesh that wraps from your back to your hips, floating the load off your spine for cool, fatigue-free miles. Dial in the fit with an adjustable harness and Fit-on-the-Fly hipbelt, then load up to 35 pounds of gear with confidence. Trail-tested organization keeps essentials within reach — zippered hipbelt pockets, stretch side pockets with dual access, a removable sleeping-bag divider and an internal hydration sleeve. The Stow-on-the-Go™ attachment secures trekking poles on the move, while dual ice-axe loops and compression straps handle technical objectives. An integrated raincover shields your kit when the skies open. Crafted from bluesign®-approved recycled nylons with a PFC/PFAS-free finish, the Atmos AG 50 delivers ventilated comfort and responsible construction in one trail-ready package.

Key Features

• Anti-Gravity™ (AG) 3D-suspended mesh backpanel and hipbelt for ventilation and even load distribution
• Adjustable shoulder harness and Fit-on-the-Fly hipbelt
• Removable floating top lid with lash points
• Removable internal sleeping-bag divider
• Stow-on-the-Go™ trekking-pole attachment and dual ice-axe loops
• Internal hydration reservoir sleeve (reservoir sold separately)
• Dual stretch-mesh side pockets with dual access and zippered hipbelt pockets
• Upper and lower compression straps; integrated raincover included

Specifications

• Capacity: 50 L (S/M)
• Weight: ~4.44 lb / 2.01 kg (S/M)
• Dimensions: 32 x 15 x 12 in (S/M)
• Recommended load range: 25–35 lb
• Fit: S/M (torso 17–20.5 in), adjustable harness and Fit-on-the-Fly hipbelt
• Main fabric: bluesign®-approved recycled 210D honeycomb nylon; 500D recycled bottom; PFC/PFAS-free DWR; aluminum frame