Nearly a pound lighter than the Exos 58 and featuring a more fine-tuned adjustment system, the Osprey Exos Pro 55 pack is designed to be comfortable on committing thru-hikes where every gram counts.

• Highly ventilated AirSpeed™ back panel supports light loads with ease while maintaining maximum airflow across your back, making it an ideal pack for long-distance endeavors
• Tensioned mesh back panel keeps the weight off your back, enabling highly ventilated carrying comfort
• Lightweight injection-molded ladder provides 4 in. of torso adjustability
• EVA foam padded hipbelt offers dynamic stretch for a secure, dynamic fit; zippered hipbelt pocket provides secure storage
• Shoulder straps combine reverse spacer mesh, die-cut EVA foam and a unique structured 3D mesh to deliver excellent support and ventilation
• Ventilated mesh yoke evenly distributes load for comfort while maintaining breathability
• Compression straps and a removable lid allow for functional capacity adjustment
• Lightweight fabrics deliver durable performance
• Sheds 2.6 oz. when the top lid is removed; integrated FlapJacket secures the main compartment opening, providing weather protection and load stability when the lid isn't used
• Removing top lid reduces carry capacity by 9 L
• Single compartment top lid includes a key clip
• 4 webbing lash points on the top lid
• Internal hydration sleeve with center-back hose port and Osprey Hydraclip for easier reservoir hanging (reservoir not included)
• 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
• Deep, dual-access stretch-mesh side pockets
• Lower side compression straps are designed to capture a sleeping pad on the front panel
• Dual ice axe loops with handle capture by the upper compression straps