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CORE Duffel

Designed for weightlifters. Made for maxing.

4.8
Rated 4.8 out of 5 stars
4.8 Stars (438 Reviews)
Select Size: Medium - 35L
Select Color: Black
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Duffel Divider
Duffel Divider
$39.95 $49.95
Lifting Belt
Lifting Belt
$39.95 $59.95
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Free, no-questions asked returnsMilitary & Emergency discount2-day shipping available (US only)FREE US SHIPPING OVER $149
  • External weightlifting belt attachment
  • 13/15” Internal laptop sleeve
  • Sealed internal shoe compartment
  • Dual bottle pockets 

Do you even lift? If so, meet your new favorite lifting partner. Say goodbye to your belt taking up precious space in your bag, with this unique and specially designed lifting belt attachment that ensures functionality isn’t compromised whatsoever. This beefed up duffel is made to store everything you need and support you every time you step into the gym. (Lifting belt sold separately).

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 CORE Duffel is made from:

  • 500D nylon body material (PVC backing)
  • YKK zippers
  • Powder-coated steel buckles
  • Ripstop nylon lining
  • Nylon webbing

Designed for weightlifting.

With max support comes max gains.

Get the support you need, every time you step into the gym. With the unique external weightlifting belt attachment, you'll never have to waste space inside your gym bag again.

Made for maxing.

FAQS

The main difference is the unique weightlifting belt attachment. This feature allows the bag be used as normal, while carrying a cumbersome lifting belt on the outside. Other changes are the volume (35L) and the layout.

Most of the materials are the same as used in other King Kong bags. YKK zippers, heavy duty buckles, nylon lining and webbing are all the same. In the CORE range, we have gone for a lighter 500D nylon outside and a new velcro logo feature that allows you to go 'incognito' with your own patches.

Measure the widest point of your belt and its length.

The CORE35 (medium) duffel can fit a belt up to 6.3"/16cm wide and 45.7"/116cm long.
The CORE51 (large) duffel can fit a belt up to 6.7"/17cm wide and 45.7"/116cm long.

A lever belt can fit, but you should count the lever into your measurement.

The CORE35 (Medium) will fit size 10 shoes. The CORE51 (Large) will fit size 13 shoes. Larger shoe sizes will fit our PLUS Duffel.

SPECS

CORE Duffel
CORE Duffel
From $159.95
Designed For
Your gym session
Dimensions
Height 28cm / 11”
Width 45cm / 18”
Depth 28cm / 11”
Capacity
35 L / 9.2 GAL
Weight
0.8 kg / 1.8 lb
Shoe Compartment
x1 pair
No. of pockets
x4 external
x2 internal
Laptop Sleeve
13 inch
Bottle Pockets
x2 external
"We believe in packing for greatness with gear that's as tough as you are, and can withstand even your toughest workouts. Each KNKG bag is made with the most durable materials and construction techniques to ensure it'll stand the test of time. Every element, from compartments and zippers to pockets and buckles, is tested for durability and efficiency, so you can trust that you are prepared to handle any challenge."

WHY KNKG?

WHY KING KONG?

"Our goal is to make bags that not only address everyday carry needs, but also enhance the way we train, explore, and push ourselves to the limit. We believe in packing for greatness with gear that is as tough as you are, and can withstand even your toughest workouts. Each King Kong bag is made with the most durable materials and construction techniques to ensure it can stand the test of time. Every element, from compartments and zippers to pockets and buckles, is tested for durability and efficiency, so you can trust that you are prepared to handle any challenge."

Workouts are tough but these bags are tougher. Effortless to carry and palpably robust. This thing does it all and measures in at the perfect size.

Designed for serious lifters who crave serious organization.

4.8
Rated 4.8 out of 5 stars
Based on 438 reviews
Total 5 star reviews: 373 Total 4 star reviews: 55 Total 3 star reviews: 4 Total 2 star reviews: 2 Total 1 star reviews: 4
98%would recommend this product
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438 reviews
  • KB
    Kathryn B.
    Verified Buyer
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, CrossFit, Functional Circuit Training
    Using For: Gym Bag, Sport / Fitness, Every Day Carry
    Rated 5 out of 5 stars
    Ultimate Gym Bag

    I recently purchased the KNKG CORE DUFFLE bag and it's the ultimate gym bag, and I have to say, it has exceeded all my expectations! As someone who frequents the gym regularly, I’ve been on the hunt for the perfect bag, and this one ticks all the boxes.

    First off, the design is sleek and modern, with a minimalistic yet stylish look that makes it perfect for both men and women. The durability is impressive too—the fabric feels high-quality and resistant to wear and tear. Even after a few weeks of use, it still looks as good as new.

    The storage capacity is incredible! The main compartment is spacious enough to fit all of your essentials like clothes, shoes, towels, free weights and even a water bottle. I love the additional compartment divider too.

    Comfort is another standout feature—the adjustable shoulder straps are padded, and the handles are sturdy and easy to grip, making it comfortable to carry no matter how heavy it gets. The lightweight design means it won’t weigh you down, even when packed full.

    Overall, this gym bag is not just functional, but also stylish and incredibly well-made. If you’re in the market for a new gym bag that combines practicality with sleek design, I highly recommend giving this one a try!

    Was this helpful?
  • EG
    Elizabeth G.
    Verified Buyer
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit, Weightlifting, Functional Circuit Training
    Using For: Work, Gym Bag
    Rated 5 out of 5 stars
    10/10 bag

    Best bag I’ve had. Hauls all my gym gear and work stuff for 24 hour shifts. I can keep my dirty work boots or gym shoes in a separate pocket and slide my coffee cup in the outside pocket to keep my hands free. This bag is sturdy and structured, well worth the cash.

    Was this helpful?
  • WR
    Will R.
    Verified Buyer
    I recommend this product
    What type of training is your KNKG bag supporting you with? Fight & Combat Sports
    Using For: Sport / Fitness
    Rated 5 out of 5 stars
    Jujitsu

    Perfect size

    Was this helpful?
  • LA
    Lacey A.
    Verified Buyer
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training
    Using For: Sport / Fitness
    Rated 5 out of 5 stars
    Top notch bag

    This bag is amazing. Heavy duty, tons of compartments, and sleek. It’s a must have.

    Was this helpful?
  • CS
    Cody S.
    Verified Buyer
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, Other
    Using For: Gym Bag, Sport / Fitness, Every Day Carry, Work
    Rated 5 out of 5 stars
    The Gold Standard of Duffels

    I’ve had and have went through a plethora of duffel bags in my training and travels. But my KNKG duffel bag, is in a league of its own, and has been the highest quality bag I’ve ever purchased. The heavyweight materials of the bag just feels like quality and you’ll know what I’m talking about when you go to feel one of these yourself. Such an innovative and thoughtful design allows you to put your weight belt in the side, shoes on the other; and all the daily essentials you could ever need for several days in the bag. The premium materials feel sturdy yet refined, and every detail like the reinforced stitching to smooth, durable zippers exudes quality. It’s super spacious, intelligently designed, and customizable too. You can add a custom patch to the side of the bag to make it your own. They’ve thought of everything.

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