Under Armour Undeniable 5.0 Small Duffle Bag, 23 L

1 / 7

Product guide

Under Armour Undeniable 5.0 Small Duffle Bag, 23 L

The Under Armour Undeniable 5.0 Small Duffle Bag is a compact sports holdall listed with 23 litres of capacity and five compartments. Its vented laundry or shoe pocket and water-repellent finish suit gym use, while its compact size may limit it for longer trips or bulky kit.

At a glance

UA Storm technology is described as providing a highly water-repellent finish, not a waterproof construction.
A vented pocket is intended for laundry or shoes, with internal slip pockets and a front zipped organisation pocket.
The listing also describes dual bottle slip pockets and MOLLE webbing attachment points.
TPU-coated, foam-lined bottom and side panels are claimed to add structure and durability.

Price

£19.89Save 38%

Reference price: ~~£32.00~~

Price checked: 13 Nov 2026

View offer

Often bought together

BEAR GRIP Multi Grip Straps/Hooks - Rubber Lifting Straps/Gloves | Gym straps with strong grip and wrist support for deadlift

£29.99

BEAR GRIP Weight Lifting Straps - Wrist Strap for Men and Women | Anti-slip hand grip, 100% cotton straps with neoprene paddi

£12.99

Pros and cons

Pros

The separate vented pocket and internal organisation features help separate footwear or laundry from other kit.
At 23 litres, the listed capacity offers a compact option for gym essentials and shorter outings.
The adjustable shoulder strap provides an alternative to carrying it by the web handle.

Cons

The small listed capacity is less suited to buyers needing room for bulky equipment or extended travel packing.

Technical specifications

15 specifications

Identity
Brand	Under Armour
Model	Undeniable 5.0 Duffle Bag
Size	X-Small
Style	Athletic
Colour	Black / Black / Metallic Silver

Capacity and dimensions
Capacity	23 litres
Dimensions	45L x 22W x 22.5H centimetres
Weight listed	0.4 Kilograms

Materials and protection
Material	Polyester
Water resistance listed	Water Repellent

Organisation and carry
Compartments	5
Closure	Zipper
Strap	Adjustable
Handle	Web Handle
Recommended uses	Gym/sports, outdoor activities, travel

What to know before buying

Listing details to confirm

The listed size, capacity and dimensions point to a compact bag, but the product description also identifies a Pitch Grey Medium Heather with Black colourway while the details specify Black / Black / Metallic Silver. Confirm the selected colour and size on the listing before purchase. Customer feedback also differs on strap convenience and durability, so treat those experiences as variable.

What’s in the box

Included

Under Armour 5.0 Undeniable XS Duffle Bag

Who is it for?

A good fit for

Gym users who want a compact bag with a separate vented pocket for shoes or laundry.
Buyers looking for a small sports or travel holdall with several organisation pockets.

Less suited to

Anyone needing a large-capacity holdall for long trips or substantial sports equipment.
Buyers who require waterproof protection rather than a water-repellent finish.

Under Armour Undeniable 5.0 Small Duffle Bag, 23 L · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 2,011 ratings

5 stars73%73%
4 stars18%18%
3 stars4%4%
2 stars1%1%
1 star4%4%

Customer feedback highlights versatility for gym use and appreciation for storage, including a small net pocket and a separate trainer compartment. Some customers describe the bag as durable while others find it flimsy, and opinions on strap convenience are mixed, including reports of a non-removable strap or a missing shoulder strap or pad. For buyers considering this compact, 23-litre bag, the reported storage benefits may suit routine gym kit, while durability and strap expectations remain variable.

Positive themes

Customers appreciate the bag's versatility for gym use and its storage features.
The customer summary reports that some buyers consider it good value for money.

Mixed feedback

Durability opinions vary, with feedback describing both durable and flimsy experiences.
Strap feedback is mixed, including reports that it is not removable and that a strap or pad was missing.

Frequently asked questions

Is this bag waterproof?

The listing describes a water-repellent finish. It does not establish that the bag is waterproof.

Does it have a separate shoe compartment?

The manufacturer describes a large vented pocket for laundry or shoes. It does not specify that the pocket is exclusively for shoes.

How much can it hold?

The listed capacity is 23 litres, with dimensions of 45L x 22W x 22.5H centimetres.

Is the shoulder strap removable?

The listing says the strap is adjustable but does not confirm that it is removable. Customer feedback is mixed about the strap design, so check the listing details if removability or a shoulder pad matters.