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Osprey Stratos 50 Litre Men's Hiking Backpack


Regular price $200.00

Tax included.

The supremely ventilated, featured and durable Osprey Stratos Series Hiking Backpacks receives a makeover that is more than skin deep. Now featuring adjustable torso lengths for improved fit and comfort with updated aesthetics, the Osprey Stratos 50 is the go-to choice for everything from big day hikes to overnight jaunts in the backcountry. When the weather turns, fear not - Stratos keeps your gear and pack protected with an integrated raincover. Smartly organized pocketing keeps all your equipment where you need it, when you need.

Features and Specifications

  1. Dual side compression straps
  2. Stow-on-the-Go trekking pole attachment
  3. Dual side stretch mesh pockets
  4. Ice tool loop with bungee tie-off
  5. Integrated raincover
  6. Zippered hipbelt pockets
  7. Internal hydration reservoir sleeve
  8. Removable top-lid with zippered slash pocket
  9. Front panel pleated fabric shove-it pocket
  10. Dual vertical zippered slash pocket on front panel shove-it

Key Attributes

Airspeed Suspension

  • Incredibly comfortable and ventilated tensioned mesh backpanel with added adjustability for variations in torso length to provide fine-tuned customization fit for every hiker and backpacker.

Seamless Hipbelt Interface

  • Users can't feel seams that don't exist, and because there aren't any on the Stratos/Sirrus updated hipbelt, hikers can focus on the journey instead of the pack on your back.
Integrated Raincover
  • Hope for bluebird weather but know you're covered with our integrated and removable raincover that stows in its own pocket when the sun returns.

Carry Information

Spacer Mesh Sewn-In Hipbelt

  • Zippered stretch mesh hipbelt pockets
  • ErgoPull hipbelt closure with hipbelts directly connected to backpanel mesh
  • Seemless lumbar to hipbelt body wrap

Airspeed Suspension Backpanel

  • LightWire alloy frame creates low profile air space optimizing pack balance and ventilation
  • 3D tensioned breathable mesh backpanel ensures supportive fit

Spacer Mesh Harness

  • Sewn-in spacer mesh
  • Adjustable sternum strap with safety whistle
  • Mesh covered ventilated die cut foam
  • Multiple torso size options with torso adjustability

Load Range
20-40 lbs
10-18 kg

Volumes and Weights

US and International weight and volume specifications

Size liter kg.
S/M 47 1.613
M/L 50 1.67


Dimensions are shown as length (height) x width x depth

S/M: 65cm H x 36cm W x 38cm D

M/L: 70cm H x36cm W x 38cm D

Key Fabrics used:

  • Main: 210D Nylon Crosshatch
  • Accent: 420HD Nylon Packcloth
  • Bottom: 420HD Nylon Packcloth

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.
Stratos 50 Litre Backpack S/M


Back Length 16-20"/40.5-51cm 19-23"/48-58.5cm