"A roomy, straightforward design built to make backpacking as easy as possible, the Osprey Rook 65L Trail Backpack offers lightweight performance with an ideal fit. A lightweight and tough design, this pack works great for overnight and weekend trips on the trail. Built around an injection-molded ladder lock torso adjustment system for a custom fit and alignment, the Rook 65L provides 4"" of torso adjustability for superior comfort and stability. Its advanced AirSpeed Suspension system starts with a 4mm LightWire peripheral frame to transfer the pack's weight from the harness to hip belt for a more comfortable carry. This supportive system combines a breathable 3D-tensioned mesh AirSpeed back panel, soft, edgeless, spacer mesh-covered padded harness and hip belt, dual upper and lower side compression straps, and adjustable sternum strap with rescue whistle. A fixed top lid with zippered pocket opens to the pack's 3,967 cu. in. of space for gear. The pack's zippered sleeping bag compartment with floating divider and removable sleeping pad straps make it easy to maximize its carrying capacity even more. An integrated rain cover protects the pack's main compartment in nasty weather and stows back in its own pocket when the sun returns. Hydration-compatible design features an internal reservoir sleeve (reservoir not included). 2 side stretch-mesh pockets and 2 hip-belt zip pockets offer easy access to vital gear. bluesign-certified pack is made of bluesign-approved recycled 600-denier polyester and 210-denier nylon fabrics with PFAS-free durable water-repellant (DWR) treatments. Osprey Daylite (not included) compatible with front-panel attachment points.Manufacturer model #: 10005875. Injection-molded ladder lock torso adjustment system with 4"" of torso adjustability Ventilated AirSpeed Suspension System 4mm peripheral LightWire frame Breathable 3D-tensioned mesh AirSpeed back panel Soft, edgeless, spacer mesh-covered padded harness and hip belt Dual upper and lower side compression straps Adjustable sternum strap with rescue whistle Osprey Daylite compatible with front-panel attachment points Fixed top lid with external zip pocket Internal hydration sleeve (reservoir not included) 2 stretch-mesh side pockets Zip sleeping bag compartment with floating divider 2 zip hip belt pockets Integrated removable rain cover bluesign-certified pack - made of recycled fabrics with PFAS-free DWR treatmentsSpecs: 29.1""H x 16.3""W x 14.2""D Load range: 30-40 lbs. Weight: 3.52 lbs."