Nearly a pound lighter than the Exos 58 and featuring a more fine-tuned adjustment system, the 55-liter Exos Pro is the most comfortable ultralight thru-hike backpack in its weight class. A highly-ventilated AirSpeed backpanel supports light loads with ease while maintaining maximum airflow across your back, making it an ideal pack for your most long-distance endeavors on the Appalachian Trail, Pacific Crest Trail and beyond.

• Ultralight Design
  
• Ultralight AirSpeed Suspension
  
• Removable, floating single compartment top lid with key clip
  
• Four webbing lash points on top lid
  
• FlapJacket secures main compartment access and provides weather protection when lid isn't used. Removing top lid reduces carry capacity by 9 L and weight by 80 g
  
• Internal hydration sleeve with center back hose port and Osprey Hydraclip for easier reservoir hanging
  
• Internal compression strap keeps loads stable
  
• Large front fabric compression pocket with stretch side panels accommodates overloads
  
• Multiple front panel lash points for securing extra gear
  
• Lower side compression straps designed to capture sleeping pad on front panel
  
• Deep, dual access stretch mesh side pockets
  Dual ice axe loops with handle capture by upper compression straps
  
• Load Range: 10 - 30 lbs
  
• Volume: S/M 3356 in3 / 55 L, L/XL 3539 in3 / 58 L
  
• Dimensions: S/M 12.2H x 3W x 28.35D in, L/XL 12.2H x 14.96W x 30.31D in
  
• Weight: S/M 2.08 lbs, L/XL 2.17 lbs
• Main: NanoFly 100D Nylon x 200D UHMWPE ripstop, DWR treatments made without PFAS
  
• Bottom: NanoFly 100D Nylon x 200D UHMWPE ripstop, DWR treatments made without PFAS