Columbia Unisex Trek 18L Backpack vs Columbia Tandem Trail 16L Backpack

The main difference between the Columbia Unisex Trek 18L Backpack and the Columbia Tandem Trail 16L Backpack is that the Unisex Trek 18L Backpack has Side Pockets (Side pockets can fit water bottle) while the Tandem Trail 16L Backpack does not.

Columbia Unisex Trek 18L Backpack Front View
Columbia Tandem Trail 16L Backpack - Front View
Specs Brand Columbia Columbia
Name Unisex Trek 18L Backpack Tandem Trail 16L Backpack
Category Laptop Hiking
Sub Category Everyday Hydration
Capacity (L) 18L 16L
Dimensions (in) 5.13 x 10.6 x 15.75 17.7 x 10.4 x 5.7
Weight (lb) 0.66
Fabric 100% Polyester 100% Nylon
Color 2 Colors and patterns Black Fallgrass/Black
Warranty Columbia Limited Lifetime Warranty
Rating 4.2
Price Under $50 Under $75
General Features Shoulder Straps Adjustable shoulder straps Lightweight and breathable shoulder straps
Sternum / Chest Straps Adjustable sternum strap
Zippers Nylon with reflective zipper pulls
Main Compartment Access Normal zipped access Normal top zipped access
External Pockets 1 front zipped pocket and 1 side pocket Two water bottle pockets
Internal Compartments Laptop mesh sleeve
Side Pockets Side pockets can fit water bottle
Water Bottle Yes Yes
Handles Top grab handle Top grab handle
Lightweight Yes Ultralight construction
Business & School Features Laptop Sleeve Laptop sleeve fits laptop up to 15" Padded
Hiking / Backpacking Features Back Panel Padded and quilted backpanel
Trekking Pole Holders Trekking pole attachments
Other Features Other Features Hydration compatible, Versatile and customizable Twin Slot webbing

You're currently comparing the Unisex Trek 18L Backpack by Columbia against the Tandem Trail 16L Backpack by Columbia.


Columbia's Unisex Trek 18L Backpack is a Laptop backpack with Everyday features while Columbia's Tandem Trail 16L Backpack is a Hiking backpack with Hydration features.

The Columbia Unisex Trek 18L Backpack has a capacity of 18L (liters), weighs pounds and it's dimensions in inches are 5.13 x 10.6 x 15.75. It's made of 100% Polyester and is available in 2 Colors and patterns in comparison the Columbia Tandem Trail 16L Backpack's capacity is 16L with a size of 17.7 x 10.4 x 5.7 inches. Constructed from 100% Nylon it weighs 0.66 pounds and is available in Black Fallgrass/Black.