Under Armour Undeniable Sackpack vs Under Armour Flex Sling Bag

The main difference between the Under Armour Undeniable Sackpack and the Under Armour Flex Sling Bag is that the Undeniable Sackpack has Sternum / Chest Straps (Custom UA sternum clip) while the Flex Sling Bag does not.

Under Armour Undeniable Sackpack Front View
Under Armour Flex Sling Bag Front View
Specs Brand Under Armour Under Armour
Name Undeniable Sackpack Flex Sling Bag
Category Drawstring Sling
Sub Category Gym Mens
Capacity (L) 25L 15L
Dimensions (in) 19 x 15 x 2 10.9 x 4.3 x 17.3
Weight (lb) 0.5 0.7
Fabric 100% Polyester 100% Polyester
Color 14+ colors and patterns 2 colors and patterns
Warranty Under Armour 60 Days Return Policy Under Armour 60 Days Return Policy
Release Date January 24, 2015
Rating 4.8 4.2
Price Under $50 Under $50
General Features Shoulder Straps Drawcord closure doubles as shoulder straps Adjustable cross-body strap
Sternum / Chest Straps Custom UA sternum clip
Main Compartment Access Drawstring access Top access with cinch closure
External Pockets 1 zipped front pocket and side pocket 1 front and 2 side pockets
Side Pockets Side pocket can fit water bottle Side pockets can fit water bottle
Water Bottle Yes Yes
Loops and Attachments D-Ring on front panel
Lightweight Yes Yes
Business & School Features Organizer Pocket Front utility pocket with organizer
Gym / Sports Features Shoe Compartment Stretch shoe pocket on front panel with buckle closure fits pair of shoes

You're currently comparing the Undeniable Sackpack by Under Armour against the Flex Sling Bag by Under Armour .


Under Armour 's Undeniable Sackpack is a Drawstring backpack with Gym features while Under Armour 's Flex Sling Bag is a Sling backpack with Mens 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 Flex Sling Bag's capacity is 15L with a size of 10.9 x 4.3 x 17.3 inches. Constructed from 100% Polyester it weighs 0.7 pounds and is available in 2 colors and patterns.