Man wearing charcoal grey KNKG PLUS Duffel bag over shoulder in gym
Front view of charcoal grey KNKG PLUS Duffel bag sitting on wooden box
Side view of charcoal grey KNKG PLUS Duffel bag sitting on wooden box, with shoulder strap suspended
Flat lay of charcoal grey KNKG PLUS Duffel bag sitting on ground surrounded by workout gear
Birds eye view of charcoal grey PLUS Duffel packed with shoes, gym clothes, headphones, bottles and skipping rope
Two pairs of NOBULL sneakers packed inside charcoal grey PLUS Duffel shoe compartments
Blender bottle and water water packed inside charcoal grey PLUS Duffel
Close up of KNKG branded zippers and steel buckles on charcoal grey PLUS Duffel
PLUS Duffel Medium 45L

PLUS Duffel Medium 45L

4.9
Rated 4.9 out of 5 stars
4.9 Stars (1,720 Reviews)
$180
Size: Medium 45L
Small 33L
Small 33L
Medium 45L
Medium 45L
Large 63L
Large 63L
Color: Charcoal
Charcoal
Charcoal
Black
Black
Redwood
Redwood
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BUILT-IN SHOE STORAGE. ZERO GYM GEAR CONTAMINATION. 

• Dual internal shoe zone
• Dual bottle pockets
• Multiple compartments and pockets 

If it ain’t broke, don’t fix it? WRONG. Always strive for better. That’s why we boosted our original duffel. With the most durable construction and optimized functionality, the PLUS Duffel will elevate your every day with the utility that will help you achieve more. Get on the right side of prepared and discover a new level of focus.

Covered by our promise to be free of defects in material or workmanship within its practical lifetime. If there is a defect in materials or workmanship KNKG will repair or replace your bag, including free shipping.

Our bags are meticulously designed to stand up to the test of time. We utilize durable materials, coupled with top-notch craftsmanship and rigorous testing, resulting in the toughest bags in the game. You can confidently pack your bag to its maximum capacity without worrying about it stretching or tearing.

The PLUS Duffel is made from:

• 1000D nylon body material

• Ripstop nylon lining

• YKK zippers

• Steel buckles

• Hypalon trims

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PLUS DUFFEL
SIZE COMPARISON
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
SMALL
33 L / 8.7 GAL
1.3 kg / 2.8 lbs
27cm / 10.6"
45cm / 17.7"
27cm / 10.6"
Size 15 Shoes (x1 pair)
MEDIUM
45 L / 11.9 GAL
1.5 kg / 3.3 lbs
30cm / 11.8"
50cm / 19.7"
30cm / 11.8"
Size 15+ Army Boots (x2 pairs)
LARGE
63 L / 17 GAL
1.5 kg / 3.3 lbs
33cm / 13"
55.9cm / 22"
30cm / 11.8"
Size 15+ Army Boots (x2 pairs)
PLUS DUFFEL
SIZE COMPARISON
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
,
SMALL
33 L / 8.7 GAL
1.3 kg / 2.8 lbs
27cm / 10.6"
45cm / 17.7"
27cm / 10.6"
Size 15 Shoes
(x1 pair)
MEDIUM
45 L / 11.9 GAL
1.5 kg / 3.3 lbs
30cm / 11.8"
50cm / 19.7"
30cm / 11.8"
Size 15+ Army Boots
(x2 pairs)
LARGE
63 L / 17 GAL
1.5 kg / 3.3 lbs
33cm / 13"
55.9cm / 22"
30cm / 11.8"
Size 15+ Army Boots
(x2 pairs)

PACK FOR MOVEMENT

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The best traditional gym bag for anyone who wants to bring fresh clothes to a workout and take sweaty clothes home again, without your gear resembling a fragrant swamp. It's tough enough to last a limetime, and its six compartments kept us organized.

GEAR UP FOR IMPROVEMENT

4.9
Rated 4.9 out of 5 stars
Based on 1,720 reviews
Total 5 star reviews: 1.6k Total 4 star reviews: 148 Total 3 star reviews: 18 Total 2 star reviews: 2 Total 1 star reviews: 2
99%would recommend these products
Slide 1 selected
1,720 reviews
  • BT
    Bryan T.
    Verified Buyer
    Reviewing
    PLUS Duffel Small 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting
    Using For: Gym Bag
    Rated 4 out of 5 stars
    Small giving me FOMO

    I’m debating switching to the medium but after reading the exchange policy I guess I’m making the small work. I took the tag off right away. Make sure you don’t use or detag your bag if you’re thinking of exchanging! The small does provide lots of options to compartmentalize, fits perfectly in my gyms locker. The water bottle holder is a little short and flimsy for my tall water bottle to not fall out.

    Was this helpful?
  • RG
    R G.
    Verified Buyer
    Reviewing
    PLUS Duffel Medium 45L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Functional Circuit Training
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Great gym bag

    Stylish, Multiple pockets to organize. Bag is a bit heavier than expected but it looks sleek and sturdy

    Was this helpful?
  • SJ
    Steven J. F.
    Verified Buyer
    Reviewing
    PLUS Duffel Medium 45L
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit, Functional Circuit Training, Weightlifting
    Using For: Gym Bag
    Rated 4 out of 5 stars
    My new KNKG 45L

    Excellent material and construction. Bag stands up and doesn't collapse like many others and lots of pockets. While this criticism isn't unique to the 45L, I would prefer that the top insert for a second pair of shoes was removed. I'd also prefer like double zippers on a couple of the openings which I had on my previous gym which was a lot cheaper. Overall an excellent gym bag.

    Was this helpful?
  • BW
    Benjamin W.
    Verified Buyer
    Reviewing
    PLUS Duffel Medium 45L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Functional Circuit Training, Weightlifting, CrossFit
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Great Duffel

    I use this at the gym everyday and the thing is legit

    Was this helpful?
  • PH
    Paul H.
    Verified Buyer
    Reviewing
    PLUS Duffel Small 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Other
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Excellent Duffel

    I didn’t really need a new gym bag. But this duffel was irresistible. It is attractive, and appears to me to be made to last a lifetime. I very strongly recommend it.

    Was this helpful?
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PLUS Duffel — The Original KNKG Gym Bag with Unmatched Shoe Storage

The PLUS Duffel is the bag that put KNKG (then King Kong Apparel) on the map. Originally designed for CrossFit, it’s a traditional gym bag elevated with smarter organization, reinforced durability, and the shoe storage system that changed how athletes pack for training.

Why the PLUS Duffel Stands Out

The PLUS is made for everyday athletes who need smarter storage. With dedicated compartments, reinforced construction, and dedicated shoe zones, this is the bag built to handle every training day.

Shoe Storage by Size

  • Small (33L): Holds 1 pair of shoes up to size 15.
  • Medium (45L): Fits 2 pairs, even size 15+ boots.
  • Large (63L): Fits 2 pairs of lifters, sneakers, or boots.

The PLUS Duffel shoe zone is ventilated to keep the inside fresh and separated from clean gear.

Pockets & Organization

  • Dedicated shoe zones
  • Spacious main compartment for clothing, towel, and bulk gear
  • Side pockets for wraps, straps, and smaller items
  • Quick access valuables pockets for wallet, phone, and keys

Materials & Build

  • 1000D nylon body material
  • Ripstop nylon lining
  • Heavy-duty YKK zippers
  • Steel buckles
  • Hypalon trims for reinforcement

The Toughest Gym Bag Quality

The PLUS Duffel was built to last from the very beginning. Reinforced stitching, abrasion-resistant nylon, and steel hardware means it can take years of daily training and travel — and still hold up like day one.

Why Choose the PLUS Duffel?

  • Classic gym bag design with smarter compartments
  • Dedicated shoe zones sized for lifters, runners, and boots
  • Multiple capacities: 33L, 45L, and 63L
  • Originally designed for CrossFit, trusted by athletes worldwide
  • Proven quality: the bag that started it all