Osprey Rook 65 Men's Backpacking Backpack vs Gregory Mountain Men's Inertia 20 H2O Day Hiking Backpack

The main difference between the Osprey Rook 65 Men's Backpacking Backpack and the Gregory Mountain Men's Inertia 20 H2O Day Hiking Backpack is that the Rook 65 Men's Backpacking Backpack has Loops and Attachments (Cord loop attachment points, loops to anchor an optional Osprey Daylite® daypack, sleeping pad straps ) while the Men's Inertia 20 H2O Day Hiking Backpack does not.

Osprey Rook 65 Men's Backpacking Backpack Front View
Gregory Mountain Products Men's Inertia 20 H2O Day Hiking Backpack Front View
Specs Brand Osprey Gregory Mountain
Name Rook 65 Men's Backpacking Backpack Men's Inertia 20 H2O Day Hiking Backpack
Category Backpacking Mens
Sub Category Mens Backpacking
Capacity (L) 65L 20L
Dimensions (in) 29.1 x 16.3 x 14.2 20.08 x 10.83 x 3.15
Weight (lb) 3.5 1.9
Fabric 600D Polyester 100% 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 4.8
Price Under $175 Under $75
General Features Shoulder Straps Soft edgeless padded mesh shoulder straps Die-cut shoulder harness
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 Normal zipped access
External Pockets Zippered hipbelt pockets, zippered sleeping bag compartment with floating divider, zippered hipbelt pockets, and 2 side pockets 5 external pockets
Side Pockets Side pockets can fit water bottle and other gears Side pockets can fit water bottle and other accessories
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
Travel Features Compression Straps External compression straps
Base / Bottom Dual layer bottom panel
Hiking / Backpacking Features Back Panel AirSpeed backpanel 3D foam breathable backpanel
Rain Cover Integrated removable raincover
Internal / External Frame Internal 4 mm LightWire peripheral frame
Adjustable Length Torso Intuitive torso adjustment system
Hip Belt Pockets Yes
Top / Floating Lid Fixed top lid with zippered pocket
Trekking Pole Holders Yes
Hydration Features Bladder Size 3 Liter 3D hydro reservoir
Replaceable Bladder Yes
Hydration Compatible Yes Yes

You're currently comparing the Rook 65 Men's Backpacking Backpack by Osprey against the Men's Inertia 20 H2O Day Hiking Backpack by Gregory Mountain .


Osprey 's Rook 65 Men's Backpacking Backpack is a Backpacking backpack with Mens features while Gregory Mountain 's Men's Inertia 20 H2O Day Hiking 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 Inertia 20 H2O Day Hiking Backpack's capacity is 20L with a size of 20.08 x 10.83 x 3.15 inches. Constructed from 100% Nylon it weighs 1.9 pounds and is available in 2 colors and patterns.