Under Armour Regiment Backpack vs Under Armour Undeniable Sackpack

The main difference between the Under Armour Regiment Backpack and the Under Armour Undeniable Sackpack is that the Regiment Backpack has Water Proof / Water Resistant (UA Storm technology water repellant finish) while the Undeniable Sackpack does not.

Under Armour Regiment Backpack Front View
Under Armour Undeniable Sackpack Front View
Specs Brand Under Armour Under Armour
Name Regiment Backpack Undeniable Sackpack
Category Mens Drawstring
Sub Category Laptop Gym
Capacity (L) 28.5L 25L
Dimensions (in) 19 x 11 x 7.5 19 x 15 x 2
Weight (lb) 2.5 0.5
Fabric Cordura Fabric 100% Polyester
Color Heather Grey Black 14+ colors and patterns
Warranty Under Armour 60 Days Return Policy Under Armour 60 Days Return Policy
Release Date ‎August 7, 2020 January 24, 2015
Rating 4.7 4.8
Price Under $100 Under $50
General Features Shoulder Straps Adjustable padded HeatGear® shoulder straps Drawcord closure doubles as shoulder straps
Sternum / Chest Straps Chest strap Custom UA sternum clip
Water Proof / Water Resistant UA Storm technology water repellant finish
Main Compartment Access Normal zipped access Drawstring access
External Pockets 2 front and 4 side pockets 1 zipped front pocket and side pocket
Side Pockets Side pockets can fit water bottle and other accessories Side pocket can fit water bottle
Water Bottle Yes Yes
Handles Top grab handle
Loops and Attachments Molle webbing D-Ring on front panel
Lightweight Yes
Business & School Features Laptop Sleeve Laptop sleeve fits up to 15"
Tablet Sleeve Padded tablet sleeve
Organizer Pocket Front utility pocket with organizer
Travel Features TSA Approved / Friendly TSA friendly
Base / Bottom Tough, abrasion-resistant PU coated bottom panel

You're currently comparing the Regiment Backpack by Under Armour against the Undeniable Sackpack by Under Armour .


Under Armour 's Regiment Backpack is a Mens backpack with Laptop features while Under Armour 's Undeniable Sackpack is a Drawstring backpack with Gym features.

The Under Armour Regiment Backpack has a capacity of 28.5L (liters), weighs 2.5 pounds and it's dimensions in inches are 19 x 11 x 7.5. It's made of Cordura Fabric and is available in Heather Grey Black in comparison the Under Armour Undeniable Sackpack's capacity is 25L with a size of 19 x 15 x 2 inches. Constructed from 100% Polyester it weighs 0.5 pounds and is available in 14+ colors and patterns.