CORE Duffel Large 51L
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
Front view of large black KNKG CORE Duffel sitting on wooden box
Side view of large black KNKG CORE Duffel with matching black lifting belt packed in sleeve
Flat lay of large black KNKG CORE Duffel surrounded by gym gear
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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
Close up of large black KNKG CORE Duffel zippers and buckles
CORE Duffel Large 51L
Medium and large CORE Duffel stacked on top of each other, showing size difference
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 (1,158 Reviews)
$200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Black
Black
Green
Natty
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Matching Lifting Belt
Matching Lifting Belt
$48 $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 guarantee to be free of defects in material or workmanship. If there is a defect in materials or workmanship KNKG will repair or replace your bag.

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
​
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 1,158 reviews
Total 5 star reviews: 1k Total 4 star reviews: 105 Total 3 star reviews: 13 Total 2 star reviews: 5 Total 1 star reviews: 12
97%would recommend these products
Slide 1 selected
1,158 reviews
  • E
    Elton
    Reviewing
    CORE Duffel Medium 35L
    I do not recommend this product
    Rated 2 out of 5 stars
    2 Stars

    Like the size and pockets, but zippers feel cheap compared to my old King Kong bag.

    Was this helpful?
  • KR
    Kachik R.
    Verified Buyer
    Reviewing
    CORE Duffel Large 51L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, Fight & Combat Sports
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Checked all the right boxes

    I highly appreciated every little detail of this bag. Starting from the outside, the belt slot is genius, finally a duffle with tall bottle slots (other brands I've tried is much shorter and bottles tip out). The overall quality of materials feels very durable and cleans very well. The interior is very well done, not too overly complicated, no compartments that can potentially leak into others, the shoe slot is designed great. Overall my favorite gym duffle. Highly recommended.

    Was this helpful?
  • EM
    E. M.
    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: Gym Bag
    Rated 5 out of 5 stars
    The Perfect Gym Bag

    For some time, I have been frustrated with the one or two gym bags I have used, and after seeing your ad, I knew this was the bag for me. True to its description, it is small enough to be carried easily into and out of a gym. It is deep enough to hold several items I use routinely while working out, such as lifting hooks, straps, and a water bottle. I could not be happier with the color, size, and construction. Excellent, well done KNKG

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  • DA
    DJ A.
    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, Functional Circuit Training, Fight & Combat Sports
    Using For: Gym Bag, Every Day Carry, Work, Sport / Fitness
    Rated 5 out of 5 stars
    The only bag you'll ever need!

    Adding my 10th KNKG bag to my collection, I can honestly say I never get enough of these bags! From exceptional craftsmanship to incredible durability, KNKG bags truly stand the test of time. Whether it’s for the gym, travel, work, or just everyday adventures, these bags always have my back.

    The waxed canvas feels like butter, seriously, unmatched quality. The thoughtful organization and smart design make them perfect for any lifestyle. I get compliments everywhere I go, and I’ve even converted several friends to the brand. Highly recommended!

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  • M
    Michael
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    Rated 4 out of 5 stars
    4 Stars

    Bag is great and am using it today in the gym. Onky recommendation is that the water bottle pocket be tighter or be adjustable. My water bottles fall right out due to no tension.

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