Under Armour Flex Sling Bag vs Under Armour Undeniable Sackpack

The main difference between the Under Armour Flex Sling Bag and the Under Armour Undeniable Sackpack is that the Flex Sling Bag has Shoe Compartment (Stretch shoe pocket on front panel with buckle closure fits pair of shoes) while the Undeniable Sackpack does not.

Under Armour Flex Sling Bag Front View
Under Armour Undeniable Sackpack Front View
Specs Brand Under Armour Under Armour
Name Flex Sling Bag Undeniable Sackpack
Category Sling Drawstring
Sub Category Mens Gym
Capacity (L) 15L 25L
Dimensions (in) 10.9 x 4.3 x 17.3 19 x 15 x 2
Weight (lb) 0.7 0.5
Fabric 100% Polyester 100% Polyester
Color 2 colors and patterns 14+ colors and patterns
Warranty Under Armour 60 Days Return Policy Under Armour 60 Days Return Policy
Release Date January 24, 2015
Rating 4.2 4.8
Price Under $50 Under $50
General Features Shoulder Straps Adjustable cross-body strap Drawcord closure doubles as shoulder straps
Sternum / Chest Straps Custom UA sternum clip
Main Compartment Access Top access with cinch closure Drawstring access
External Pockets 1 front and 2 side pockets 1 zipped front pocket and side pocket
Side Pockets Side pockets can fit water bottle Side pocket 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 Flex Sling Bag by Under Armour against the Undeniable Sackpack by Under Armour .


Under Armour 's Flex Sling Bag is a Sling backpack with Mens features while Under Armour 's Undeniable Sackpack is a Drawstring backpack with Gym features.

The Under Armour Flex Sling Bag has a capacity of 15L (liters), weighs 0.7 pounds and it's dimensions in inches are 10.9 x 4.3 x 17.3. It's made of 100% Polyester and is available in 2 colors and patterns 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.