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.

• 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
• 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

S/M

• VOLUME: 3356 IN3 / 55 L
• DIMENSIONS: 28.35H X 3W X 12.2D IN.
• WEIGHT: 2.077 LBS

L/XL

• VOLUME:  3539 IN3 / 58 L
• DIMENSIONS: 30.31H X 14.96W X 12.2D IN
• WEIGHT:  2.165 LBS.