The main difference between the Osprey Rook 65 Men's Backpacking Backpack and the Gregory Mountain Men's Optic 55 Ultralight Backpack is that the Rook 65 Men's Backpacking Backpack has Adjustable Length Torso (Intuitive torso adjustment system) while the Men's Optic 55 Ultralight Backpack does not.
Specs | Brand | Osprey | Gregory Mountain |
Name | Rook 65 Men's Backpacking Backpack | Men's Optic 55 Ultralight Backpack | |
Category | Backpacking | Mens | |
Sub Category | Mens | Backpacking | |
Capacity (L) | 65L | 55L | |
Dimensions (in) | 29.1 x 16.3 x 14.2 | 23.5 x 12.6 x 4.2 | |
Weight (lb) | 3.5 | 2.4 | |
Fabric | 600D Polyester | Nylon | |
Color | 3 colors and patterns | 2 colors and patterns | |
Warranty | Osprey Lifetime Warranty | The Gregory Limited Lifetime Warranty | |
Release Date | February 2, 2019 | November 9, 2017 | |
Rating | 4.8 | 4.1 | |
Price | Under $175 | Under $225 | |
General Features | Shoulder Straps | Soft edgeless padded mesh shoulder straps | Padded shoulder straps |
Sternum / Chest Straps | Adjustable sternum strap with rescue whistle | Sternum and chest strap | |
Hip Belt / Waist Strap | Padded hipbelt | 3D comfort cradle hipbelt | |
Zippers | ComfortGrip custom molded loop zipper pullers | ||
Main Compartment Access | Top access with lid | U-zip main opening or full body front access | |
External Pockets | Zippered hipbelt pockets, zippered sleeping bag compartment with floating divider, zippered hipbelt pockets, and 2 side pockets | 3 external pockets including weather shield hip belt pocket | |
Side Pockets | Side pockets can fit water bottle and other gears | Side pockets can hold water bottle | |
Water Bottle | Yes | Yes | |
Handles | Top grab handle | Top grab handle | |
Loops and Attachments | Cord loop attachment points, loops to anchor an optional Osprey Daylite® daypack, sleeping pad straps | Adjustable attachment loop and upper shock lock | |
Travel Features | Compression Straps | External compression straps | External compression straps |
Rear Loading Straps | Yes | ||
Hiking / Backpacking Features | Back Panel | AirSpeed backpanel | Ventilated back panel |
Rain Cover | Integrated removable raincover | Yes | |
Internal / External Frame | Internal 4 mm LightWire peripheral frame | Aluminum internal frame | |
Ventilated Back | Yes | ||
Adjustable Length Torso | Intuitive torso adjustment system | ||
Hip Belt Pockets | Yes | ||
Top / Floating Lid | Fixed top lid with zippered pocket | Yes | |
Hydration Features | Hydration Compatible | Yes | Yes |
Osprey 's Rook 65 Men's Backpacking Backpack is a Backpacking backpack with Mens features while Gregory Mountain's Men's Optic 55 Ultralight Backpack is a Mens backpack with Backpacking features.
The Osprey Rook 65 Men's Backpacking Backpack has a capacity of 65L (liters), weighs 3.5 pounds and it's dimensions in inches are 29.1 x 16.3 x 14.2. It's made of 600D Polyester and is available in 3 colors and patterns in comparison the Gregory Mountain Men's Optic 55 Ultralight Backpack's capacity is 55L with a size of 23.5 x 12.6 x 4.2 inches. Constructed from Nylon it weighs 2.4 pounds and is available in 2 colors and patterns.
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