Osprey Exos 58 Mens Backpacking Backpack vs Gregory Mountain Men's Optic 55 Ultralight Backpack

The main difference between the Osprey Exos 58 Mens Backpacking Backpack and the Gregory Mountain Men's Optic 55 Ultralight Backpack is that the Exos 58 Mens Backpacking Backpack has Load Lifters (Yes) while the Men's Optic 55 Ultralight Backpack does not.

Osprey Exos 58 Mens Backpacking Backpack Front View
Gregory Mountain Products Men's Optic 55 Ultralight Backpack Front View
Specs Brand Osprey Gregory Mountain
Name Exos 58 Mens Backpacking Backpack Men's Optic 55 Ultralight Backpack
Category Backpacking Mens
Sub Category Mens Backpacking
Capacity (L) 58L 55L
Dimensions (in) 31.5 x16.14 x 14.57 23.5 x 12.6 x 4.2
Weight (lb) 2.7 2.4
Fabric 100D High Tenacity Nylon Nylon
Color 2 colors and patterns 2 colors and patterns
Warranty Osprey Lifetime Warranty The Gregory Limited Lifetime Warranty
Release Date February 4, 2015 November 9, 2017
Rating 4.6 4.1
Price Under $250 Under $225
General Features Shoulder Straps Exoform shoulder straps Padded shoulder straps
Sternum / Chest Straps Sternum strap with integrated safety whistle Sternum and chest strap
Hip Belt / Waist Strap Exoform hipbelt 3D comfort cradle hipbelt
Zippers ComfortGrip custom molded loop zipper pullers
Main Compartment Access Top loading access U-zip main opening or full body front access
External Pockets Front stretch mesh pocket and 2 side pockets 3 external pockets including weather shield hip belt pocket
Side Pockets Side pockets can fit water bottle Side pockets can hold water bottle
Water Bottle Yes Yes
Handles Top grab handle Top grab handle
Loops and Attachments Ice axe attachment with bungee tie-off, accessory cord attachment points, and Stow-on-the-Go trekking pole attachment Adjustable attachment loop and upper shock lock
Travel Features Compression Straps External compression straps External compression straps
Rear Loading Straps Yes Yes
Hiking / Backpacking Features Back Panel 3D-tensioned breathable mesh backpanel with side ventilation Ventilated back panel
Rain Cover Yes
Load Lifters Yes
Internal / External Frame 4mm Lightwire alloy internal frame Aluminum internal frame
Ventilated Back Yes Yes
Hip Belt Pockets Yes
Top / Floating Lid Yes Yes
Trekking Pole Holders Yes
Hydration Features Bladder Size Holds 3L hydration reservoir
Hydration Compatible Yes Yes

You're currently comparing the Exos 58 Mens Backpacking Backpack by Osprey against the Men's Optic 55 Ultralight Backpack by Gregory Mountain.


Osprey 's Exos 58 Mens 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 Exos 58 Mens Backpacking Backpack has a capacity of 58L (liters), weighs 2.7 pounds and it's dimensions in inches are 31.5 x16.14 x 14.57. It's made of 100D High Tenacity Nylon and is available in 2 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.