Gregory Mountain Nano 20 Backpack vs Mountaintop 40L Hiking Backpack

The main difference between the Gregory Mountain Nano 20 Backpack and the Mountaintop 40L Hiking Backpack is that the Nano 20 Backpack has Hydration Compatible (Yes) while the 40L Hiking Backpack does not.

Gregory Mountain Products Nano 20 Everyday Outdoor Backpack 1st Front View
Mountaintop 40L Hiking Backpack FRont View
Specs Brand Gregory Mountain Mountaintop
Name Nano 20 Backpack 40L Hiking Backpack
Category Backpacking Hiking
Sub Category Hiking Outdoor
Capacity (L) 20L 40L
Dimensions (in) 19.2 x 1.7 x 1 20.1 x 13.8 x 6.3
Weight (lb) 1.5 2.1
Fabric Nylon Polyester
Color Obsidian Black 20+ colors and patterns
Warranty The Gregory Limited Lifetime Warranty Mountaintop Warranty
Release Date August 1, 2016
Rating 4.0 4.6
Price Under $75 Under $50
General Features Shoulder Straps Air mesh padded shoulder straps S-curve sponge padded shoulder strap
Sternum / Chest Straps Sternum strap Elastic chest strap
Hip Belt / Waist Strap Removable hip belt Adjustable waist belt
Water Proof / Water Resistant Water resistant material
Zippers YKK zippers
Main Compartment Access Normal zipped access Normal zipped access
External Pockets 1 zipped front pocket and 2 side pockets Zipped top, middle and bottom pockets plus two side pockets
Internal Compartments Spacious main compartment with pockets
Side Pockets Side pockets can fit water bottle and other accessories Side pockets can fit water bottle or umbrella
Water Bottle Yes Yes
Handles Top grab handle Top grab handle
Business & School Features Laptop Sleeve Laptop pocket fits up to 17"
Tablet Sleeve Tablet sleeve fits up to 10” Separate tablet pocket
Organizer Pocket Front utility pocket
Travel Features Carry-on Size Compliant 40.2 linear inches carry on size compliant
Compression Straps External compression straps
Hiking / Backpacking Features Back Panel Breathable back panel Breathable padded back panel
Rain Cover Rain cover included
Ventilated Back Air diversion back system
Trekking Pole Holders Hiking pole attachment
Gym / Sports Features Shoe Compartment Bottom compartment for shoes
Hydration Features Hydration Compatible Yes

You're currently comparing the Nano 20 Backpack by Gregory Mountain against the 40L Hiking Backpack by Mountaintop .


Gregory Mountain 's Nano 20 Backpack is a Backpacking backpack with Hiking features while Mountaintop 's 40L Hiking Backpack is a Hiking backpack with Outdoor features.

The Gregory Mountain Nano 20 Backpack has a capacity of 20L (liters), weighs 1.5 pounds and it's dimensions in inches are 19.2 x 1.7 x 1. It's made of Nylon and is available in Obsidian Black in comparison the Mountaintop 40L Hiking Backpack's capacity is 40L with a size of 20.1 x 13.8 x 6.3 inches. Constructed from Polyester it weighs 2.1 pounds and is available in 20+ colors and patterns.