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Osprey Exos 58 Litre Ultralight Backpack - Latest Model


Regular price $349.95

Tax included.

When every ounce matters but you still need a backpack that's more than just a sack with shoulder straps, the Osprey E xos Hiking Backpack makes for an excellent ultralight companion. The Exos 58, made of 100% recycled materials, is perfect for those more committing trips when resupply is few and far between. Highly experienced backpackers will appreciate industry-leading comfort and ventilation—without the weight it often adds—making it the perfect pack for committing thru-hikes and ultralights like the AT or Colorado Trail. Need to slim things down even further? Remove the floating lid and use the integrated FlapJacket to protect your gear inside. Plus, our refined AirSpeed® suspension keeps you cool with maximum airflow between you and your pack, so each mile stays as comfortable as the last.

Key Attributes


Two hipbelt pockets for easy on-the-go access to necessities.


Injection-molded ladder adjustment system provides 4" of torso adjustability.


Strong backpanel mesh and durable main body fabrics provide increased reliability.


  1. Top pocket web loop attachment points
  2. Removable floating lid with top- and under-lid zippered pockets
  3. Integrated FlapJacket cover for lidless use
  4. Internal hydration sleeve with center back hose port
  5. Front stretch mesh pocket for stashing gear
  6. Dual-access stretch mesh side pockets
  7. Dual strippable side compression straps
  8. Web lash points for attaching overloads
  9. Removable sleeping pad straps
  10. Dual ice axe loops with bungee tie-off
  11. Dual zippered hipbelt pockets to keep essentials handy
  12. Stow-on-the-Go trekking pole attachment
  13. Sternum strap with integrated safety whistle

Carry Information


  • Injection-molded ladder adjustment system provides 4" of torso adjustability
  • Two size per gender design ensures perfect fit and allows for quick, easy adjustment
  • Stronger mesh and reduced seam design provides increased reliability for rigorous thru-hike usage
  • 4 mm powder coated LightWire frame


  • Seamless layered mesh provides improved comfort and cushioning
  • 15 mm adjustable slide sternum strap


  • Zippered hipbelt pockets provide secure and accessible storage for on-trail essentials
  • Extended hipbelt shape increases carry comfort
  • ErgoPull closure provides leverage to ensure snug fit and optimal load transfer


Load Range™
14-16 kg

Volumes and Weights

US and International weight and volume specifications

Size cu. in. liter lbs/oz kg.
S/M 3539
58 2.84 1.288
L/XL 3722
2.941 1.334


Size Height Width Depth
77cm 37cm 33cm
37cm 33cm
Key Fabrics used:
  • MAIN: bluesign® approved recycled 100D high tenacity nylon ripstop, PFC/PFAS-free DWR
  • ACCENT: bluesign® approved recycled 400D high tenacity nylon, PFC/PFAS-free DWR
  • BOTTOMbluesign® approved recycled 100D high tenacity nylon ripstop, PFC/PFAS-free DWR



Sizing and Fitting of your Osprey Pack

Fit is the key to pack performance. Take the time to get it right. Most Osprey packs are available in multiple sizes to fit a range of torso lengths. To find your torso length, have a friend measure your back along the spine (as shown in the picture below) from the level of your iliac crest (the top of your hipbones) to your C7 (the knobby bone at the base of your neck).

Use the table below to determine your pack size.

Exos 58 Litre Backpack Small /Medium Large/Extra Large
Back Length 17-20"/43-51cm 19-23"/48-58.5cm