Man inside gym wearing large black KNKG CORE Duffel over shoulder
Man wearing large black KNKG CORE Duffel over shoulder, showing lifting belt wrapped around bag, inside sleeve
Side view of large black KNKG CORE Duffel with lifting belt
CORE Duffel Large 51L
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Side view of large black KNKG CORE Duffel with matching black lifting belt packed in sleeve
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Birds eye view of large black KNKG CORE Duffel fully packed with gym gear
Birds eye view of internal divider organization system packed inside large black KNKG CORE Duffel
Drink bottle and shaker packed inside large black KNKG CORE Duffel bottle pockets
NOBULL sneakers packed inside large black KNKG CORE Duffel wet zone / shoe compartment
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CORE Duffel Large 51L
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Side by side of large and medium CORE Duffel showing size difference

CORE Duffel Large 51L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (814 Reviews)
$200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Black
Desert
Desert
Black
Black
Green
Green
Natty
Natty
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Duffel Divider
Duffel Divider
$40 $50
Matching Lifting Belt
Matching Lifting Belt
$40 $60
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BEST SELLING GYM DUFFEL WITH DEDICATED LIFTING BELT STORAGE

  • 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. The CORE 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
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CORE DUFFEL
SIZE COMPARISON
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
Laptop Sleeve
Lifting Belt Size
MINI
15 L / 4 GAL
0.6 kg / 1.3 lbs
23cm / 9.1"
38cm / 15"
18cm / 7.1"
Not recommended
iPad
KNKG Belt
MEDIUM
35 L / 9.2 GAL
0.8 kg / 1.8 lbs
28cm / 11"
45cm / 17.7"
28cm / 11"
Size 10
Up to 13"
6.3" (W) - 45.7" (L)
LARGE
51 L / 13.4 GAL
1 kg / 2.2 lbs
32cm / 12.6"
50.8cm / 20"
32cm / 12.6"
Size 13
Up to 15"
6.7" (W) - 51.5" (L)
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
Laptop Sleeve
Lifting Belt Size
MINI
15 L / 3.96 GAL
0.6 kg / 1.3 lbs
23cm / 9.1"
38cm / 15"
18cm / 7.1"
Not recommended
iPad
KNKG Belt
MEDIUM
35 L / 9.2 GAL
0.8 kg / 1.8 lbs
28cm / 11"
45cm / 17.7"
28cm / 11"
Size 10
Up to 13"
6.3" (W) - 45.7" (L)
LARGE
51 L / 13.4 GAL
1 kg / 2.2 lbs
32cm / 12.6"
50.8cm / 20"
32cm / 12.6"
Size 13
Up to 15"
6.7" (W) - 51.5" (L)

Designed for weightlifting.

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.

This is the best gym bag for powerlifters. Many amazing features that set this bag apart from its rivals. The outer material is tough, durable, and lightweight while also being water resistant and easy to clean.

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 KNKG 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.
4.8
Rated 4.8 out of 5 stars
Based on 814 reviews
Total 5 star reviews: 711 Total 4 star reviews: 81 Total 3 star reviews: 8 Total 2 star reviews: 3 Total 1 star reviews: 11
97%would recommend these products
Slide 1 selected
814 reviews
  • YP
    Yong P.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding
    Using For: Every Day Carry
    Rated 5 out of 5 stars
    Mini duffle

    One of the best bags you can buy

    Was this helpful?
  • DB
    Daniel B.
    Verified Buyer
    Reviewing
    CORE Duffel Waxed Canvas Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Fight & Combat Sports, Other
    Using For: Work
    Rated 5 out of 5 stars
    One of the Best Duffles I’ve Ever Owned

    This duffel is outstanding. The waxed canvas not only looks great but feels great too, and carrying it honestly adds a sense of pride. The build feels premium, the size is perfect, and it just gets better with use. Hands down, one of the best duffles I’ve ever owned.

    The delivery was absolutely top tier. The packaging itself gives an awesome factor. On top of that, the extra items are a nice touch. The wallet and keychain are high-quality, but the box is something that you don't expect. I walked away from the transaction feeling like I actually won, in a current economic climate that leaves you feeling taken advantage of a lot lately. The entire experience, from product to presentation, is simply next level.

    10/10 Would recommend. Price isn’t always about just the item. In this case, it’s about the way a company treats you, the experience they create, and the thought they put into every detail. KNKG delivered all of that here. This is a master class in how to earn a customer for life.

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  • SR
    Shane R.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? None - I don't use my bag for training
    Using For: Every Day Carry, Work
    Rated 5 out of 5 stars
    Durable Strong Bag

    perfect size for day trips or 1 night sleepovers. Great quality. Great storage. Well constructed.

    Was this helpful?
  • JI
    John I.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training, Other
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Excellent quality

    Really impressed with both bags that i purchased.

    Was this helpful?
  • AS
    Amiel S.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Bodybuilding, Olympic Lifting, Fight & Combat Sports, CrossFit
    Using For: Gym Bag, Sport / Fitness, Every Day Carry
    Rated 5 out of 5 stars
    small compact but more than enough

    absolutely perfect small compact with enough space and compartments for overnight bag

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