We compared two gym duffel bags: the Under Armour Undeniable 5.0 Small Duffle Bag and the 42L Waterproof Gym Bag with Shoes Compartment.
What we looked at
Capacity, shoe storage, pockets, water protection, and price.
The verdict
If you want a branded, water-repellent duffle with a vented shoe or laundry pocket, the Under Armour Undeniable 5.0 is the pick at £23.99. If you would rather save £4.00 and get a dedicated shoe compartment, a wet pouch and 9 pockets, the 42L waterproof bag is the alternative, at £19.99.

A £23.99 duffle of about 40L with UA Storm water repellency.

A £19.99 42L bag with a shoe compartment, wet pouch and combination lock.
Under Armour Undeniable 5.0 Small Duffle Bag (Black) — Brand Pick
Intended for: Marketed as a lightweight small duffle bag of approximately 40L with UA Storm water-repellent technology, TPU-coated foam-lined panels on the base and sides, a large vented pocket for shoes or laundry, smaller internal pockets, dual water bottle slip pockets and an adjustable shoulder strap. Carries 4.6 stars from 18.6K ratings on this listing.
What we liked
- UA Storm water-repellent exterior per the listing
- Large vented pocket for shoes or laundry
- Dual water bottle pockets and internal organisation pockets
- Large review history (18.6K ratings) and a 4.6 star rating
Worth knowing
- Costs £4.00 more than the 42L bag on these listings
- No separate wet pouch or combination lock stated
Best for
- Buyers who want a branded, durable duffle
- Anyone who wants water-repellent fabric
- Those who want a vented shoe or laundry pocket
Not ideal for
- Budget-conscious buyers
- Anyone who wants a built-in lock and wet pouch
42L Waterproof Gym Bag with Shoes Compartment and Wet Pocket — Most Pockets
Intended for: Marketed as a 42L duffel bag (about 55 x 27 x 28cm) with a separate shoe compartment with 2 air vents, a wet pouch, 9 kinds of pockets, a scratch-resistant, anti-tear, water-splash-resistant polyester jacquard fabric, a combination lock in the zipper, adjustable handles and a detachable shoulder strap. Carries 4.4 stars from 3.7K ratings on this listing.
What we liked
- Cheaper than the Under Armour on these listings, at £19.99
- Separate shoe compartment with 2 air vents
- Wet pouch and 9 kinds of pockets
- Combination lock and detachable shoulder strap
Worth knowing
- Unbranded, with a smaller review history than the Under Armour (3.7K vs 18.6K ratings)
- Lower star rating than the Under Armour (4.4 vs 4.6)
Best for
- Buyers who want a dedicated shoe compartment
- Anyone who wants lots of pockets and a lock
- Those who want the lower price
Not ideal for
- Buyers who want a sports brand
- Anyone who wants the highest-rated option



