The main difference between the Gregory Mountain Men's Optic 55 Ultralight Backpack and the Osprey Atmos AG 50 Mens Backpacking Backpack is that the Men's Optic 55 Ultralight Backpack has Zippers (ComfortGrip custom molded loop zipper pullers) while the Atmos AG 50 Mens Backpacking Backpack does not.
Specs | Brand | Gregory Mountain | Osprey |
Name | Men's Optic 55 Ultralight Backpack | Atmos AG 50 Mens Backpacking Backpack | |
Category | Mens | Mens | |
Sub Category | Backpacking | Backpacking | |
Capacity (L) | 55L | 50L | |
Dimensions (in) | 23.5 x 12.6 x 4.2 | 32.68 x 14.96 x 15.35 | |
Weight (lb) | 2.4 | 4.2 | |
Fabric | Nylon | 100D X 630D Nylon Dobby | |
Color | 2 colors and patterns | 3 colors and patterns | |
Warranty | The Gregory Limited Lifetime Warranty | Osprey Lifetime Warranty | |
Release Date | November 9, 2017 | August 15, 2015 | |
Rating | 4.1 | 4.7 | |
Price | Under $225 | Under $250 | |
General Features | Shoulder Straps | Padded shoulder straps | Adjustable shoulder straps |
Sternum / Chest Straps | Sternum and chest strap | Sternum strap with integrated safety whistle | |
Hip Belt / Waist Strap | 3D comfort cradle hipbelt | Fit-on-the-Fly hipbelt with pockets | |
Zippers | ComfortGrip custom molded loop zipper pullers | ||
Main Compartment Access | U-zip main opening or full body front access | Top loading access | |
External Pockets | 3 external pockets including weather shield hip belt pocket | Front stretch mesh pocket and 2 stretch mesh side pockets | |
Side Pockets | Side pockets can hold water bottle | Side pockets can fit water bottle | |
Water Bottle | Yes | Yes | |
Handles | Top grab handle | Top grab handle | |
Loops and Attachments | Adjustable attachment loop and upper shock lock | Web attachment points, dual ice tool loops, Stow-on-the-Go trekking pole attachment, integrated FlapJacket | |
Travel Features | Compression Straps | External compression straps | External compression straps |
Stowable Straps | Removable sleeping pad straps | ||
Rear Loading Straps | Yes | ||
Hiking / Backpacking Features | Back Panel | Ventilated back panel | Innovative AntiGravity suspension |
Rain Cover | Yes | ||
Internal / External Frame | Aluminum internal frame | LightWire-tensioned, full peripheral frame comfortably transfers pack load | |
Ventilated Back | Yes | Yes | |
Hip Belt Pockets | Yes | Yes | |
Top / Floating Lid | Yes | Yes | |
Trekking Pole Holders | Yes | ||
Hydration Features | Bladder Size | Holds 3L hydration reservoir | |
Hydration Compatible | Yes | Yes |
Gregory Mountain's Men's Optic 55 Ultralight Backpack is a Mens backpack with Backpacking features while Osprey 's Atmos AG 50 Mens Backpacking Backpack is a Mens backpack with Backpacking features.
The Gregory Mountain Men's Optic 55 Ultralight Backpack has a capacity of 55L (liters), weighs 2.4 pounds and it's dimensions in inches are 23.5 x 12.6 x 4.2 . It's made of Nylon and is available in 2 colors and patterns in comparison the Osprey Atmos AG 50 Mens Backpacking Backpack's capacity is 50L with a size of 32.68 x 14.96 x 15.35 inches. Constructed from 100D X 630D Nylon Dobby it weighs 4.2 pounds and is available in 3 colors and patterns.
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