The main difference between the Gregory Mountain Men's Optic 48 Ultralight Backpack and the Osprey Rook 65 Men's Backpacking Backpack is that the Men's Optic 48 Ultralight Backpack has Zippers (ComfortGrip custom molded loop zipper pullers) while the Rook 65 Men's Backpacking Backpack does not.
Specs | Brand | Gregory Mountain | Osprey |
Name | Men's Optic 48 Ultralight Backpack | Rook 65 Men's Backpacking Backpack | |
Category | Mens | Backpacking | |
Sub Category | Backpacking | Mens | |
Capacity (L) | 48L | 65L | |
Dimensions (in) | 26 x 14 x 4.5 | 29.1 x 16.3 x 14.2 | |
Weight (lb) | 2.4 | 3.5 | |
Fabric | Nylon | 600D Polyester | |
Color | 2 colors and patterns | 3 colors and patterns | |
Warranty | The Gregory Limited Lifetime Warranty | Osprey Lifetime Warranty | |
Release Date | November 9, 2017 | February 2, 2019 | |
Rating | 4.6 | 4.8 | |
Price | Under $250 | Under $175 | |
General Features | Shoulder Straps | Men's specific die-cut shoulder harness | Soft edgeless padded mesh shoulder straps |
Sternum / Chest Straps | Sternum strap | Adjustable sternum strap with rescue whistle | |
Hip Belt / Waist Strap | 3D comfort cradle hipbelt | Padded hipbelt | |
Zippers | ComfortGrip custom molded loop zipper pullers | ||
Main Compartment Access | U-zip main opening or full body front access | Top access with lid | |
External Pockets | 3 external pockets including weather shield hip belt pocket | Zippered hipbelt pockets, zippered sleeping bag compartment with floating divider, zippered hipbelt pockets, and 2 side pockets | |
Side Pockets | Side pockets can hold water bottle | Side pockets can fit water bottle and other gears | |
Water Bottle | Yes | Yes | |
Handles | Top grab handle | Top grab handle | |
Loops and Attachments | Adjustable attachment loop and upper shock lock | Cord loop attachment points, loops to anchor an optional Osprey Daylite® daypack, sleeping pad straps | |
Travel Features | Compression Straps | External compression straps | External compression straps |
Rear Loading Straps | Yes | ||
Hiking / Backpacking Features | Back Panel | Ventilated back panel | AirSpeed backpanel |
Rain Cover | Yes | Integrated removable raincover | |
Internal / External Frame | Aluminum internal frame | Internal 4 mm LightWire peripheral frame | |
Ventilated Back | Yes | ||
Adjustable Length Torso | Yes | Intuitive torso adjustment system | |
Hip Belt Pockets | Yes | ||
Top / Floating Lid | Yes | Fixed top lid with zippered pocket | |
Hydration Features | Hydration Compatible | Yes | Yes |
Gregory Mountain 's Men's Optic 48 Ultralight Backpack is a Mens backpack with Backpacking features while Osprey 's Rook 65 Men's Backpacking Backpack is a Backpacking backpack with Mens features.
The Gregory Mountain Men's Optic 48 Ultralight Backpack has a capacity of 48L (liters), weighs 2.4 pounds and it's dimensions in inches are 26 x 14 x 4.5. It's made of Nylon and is available in 2 colors and patterns in comparison the Osprey Rook 65 Men's Backpacking Backpack's capacity is 65L with a size of 29.1 x 16.3 x 14.2 inches. Constructed from 600D Polyester it weighs 3.5 pounds and is available in 3 colors and patterns.
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