Under Armour Undeniable Sackpack vs Under Armour Regiment Backpack

The main difference between the Under Armour Undeniable Sackpack and the Under Armour Regiment Backpack is that the Undeniable Sackpack has Lightweight (Yes) while the Regiment Backpack does not.

Under Armour Undeniable Sackpack Front View
Under Armour Regiment Backpack Front View
Specs Brand Under Armour Under Armour
Name Undeniable Sackpack Regiment Backpack
Category Drawstring Mens
Sub Category Gym Laptop
Capacity (L) 25L 28.5L
Dimensions (in) 19 x 15 x 2 19 x 11 x 7.5
Weight (lb) 0.5 2.5
Fabric 100% Polyester Cordura Fabric
Color 14+ colors and patterns Heather Grey Black
Warranty Under Armour 60 Days Return Policy Under Armour 60 Days Return Policy
Release Date January 24, 2015 ‎August 7, 2020
Rating 4.8 4.7
Price Under $50 Under $100
General Features Shoulder Straps Drawcord closure doubles as shoulder straps Adjustable padded HeatGear® shoulder straps
Sternum / Chest Straps Custom UA sternum clip Chest strap
Water Proof / Water Resistant UA Storm technology water repellant finish
Main Compartment Access Drawstring access Normal zipped access
External Pockets 1 zipped front pocket and side pocket 2 front and 4 side pockets
Side Pockets Side pocket can fit water bottle Side pockets can fit water bottle and other accessories
Water Bottle Yes Yes
Handles Top grab handle
Loops and Attachments D-Ring on front panel Molle webbing
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 Undeniable Sackpack by Under Armour against the Regiment Backpack by Under Armour .


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

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