Gregory Mountain Men's Inertia 20 H2O Day Hiking Backpack vs Gregory Mountain Zulu 55 Backpack

The main difference between the Gregory Mountain Men's Inertia 20 H2O Day Hiking Backpack and the Gregory Mountain Zulu 55 Backpack is that the Men's Inertia 20 H2O Day Hiking Backpack has Bladder Size (3 Liter 3D hydro reservoir) while the Zulu 55 Backpack does not.

Gregory Mountain Products Men's Inertia 20 H2O Day Hiking Backpack Front View
Gregory Mountain Zulu 55 Backpack Side View
Specs Brand Gregory Mountain Gregory Mountain
Name Men's Inertia 20 H2O Day Hiking Backpack Zulu 55 Backpack
Category Mens Mens
Sub Category Backpacking Hiking
Capacity (L) 20L 55L
Dimensions (in) 20.08 x 10.83 x 3.15 30 x 13.25 x 12
Weight (lb) 1.9 3.6
Fabric 100% Nylon 100% Nylon
Color 2 colors and patterns 2 colors and patterns
Warranty The Gregory Limited Lifetime Warranty The Gregory Limited Lifetime Warranty
Release Date November 9, 2017 January 22, 2019
Rating 4.8 4.8
Price Under $75 Under $200
General Features Shoulder Straps Die-cut shoulder harness Die-cut shoulder harness
Sternum / Chest Straps Sternum and chest strap Sternum strap with safety whistle and hydration clip
Hip Belt / Waist Strap 3D comfort cradle hipbelt 3D comfort cradle hipbelt
Zippers ComfortGrip custom molded loop zipper pullers ComfortGrip custom molded loop zipper pullers
Main Compartment Access Normal zipped access Front U-Zip access
External Pockets 5 external pockets Floating top pocket with zippered compartment and an underside zippered pocket, front stretch mesh pocket, sleeping bag compartment with divider, and 2 side pockets
Side Pockets Side pockets can fit water bottle and other accessories Side pockets can fit water bottle and other accessories
Water Bottle Yes Yes
Handles Top grab handle Top grab handle
Loops and Attachments Adjustable attachment loop and upper shock lock
Travel Features Compression Straps External compression straps
Rear Loading Straps Yes
Base / Bottom Dual layer bottom panel Dual layer bottom panel
Hiking / Backpacking Features Back Panel 3D foam breathable backpanel 3D foam breathable back panel
Rain Cover Yes
Internal / External Frame External perimeter alloy frame
Ventilated Back Yes
Adjustable Length Torso Yes
Hip Belt Pockets Yes Yes
Top / Floating Lid Yes
Trekking Pole Holders Yes Yes
Reflective Safety Strips Reflective attachment points
Hydration Features Bladder Size 3 Liter 3D hydro reservoir
Replaceable Bladder Yes
Hydration Compatible Yes Yes

You're currently comparing the Men's Inertia 20 H2O Day Hiking Backpack by Gregory Mountain against the Zulu 55 Backpack by Gregory Mountain .


Gregory Mountain 's Men's Inertia 20 H2O Day Hiking Backpack is a Mens backpack with Backpacking features while Gregory Mountain 's Zulu 55 Backpack is a Mens backpack with Hiking features.

The Gregory Mountain Men's Inertia 20 H2O Day Hiking Backpack has a capacity of 20L (liters), weighs 1.9 pounds and it's dimensions in inches are 20.08 x 10.83 x 3.15. It's made of 100% Nylon and is available in 2 colors and patterns in comparison the Gregory Mountain Zulu 55 Backpack's capacity is 55L with a size of 30 x 13.25 x 12 inches. Constructed from 100% Nylon it weighs 3.6 pounds and is available in 2 colors and patterns.