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CORE Duffel Large 51L
Side view of large desert CORE Duffel with matching lifting belt stowed in belt sleeve
Large desert CORE Duffel sitting on wooden box
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Birds eye view of large desert CORE Duffel packed with gym gear
Birds eye view of internal divider organization system inside large desert CORE Duffel
Water bottle and shaker bottle packed inside large desert CORE Duffel bottle pockets
NOBULL sneakers packed inside large desert CORE Duffel shoe compartment
Close up of large desert CORE Duffel buckles and zippers
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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 (876 Reviews)
$200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Desert
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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DESIGNED FOR SUPERIOR 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 876 reviews
Total 5 star reviews: 768 Total 4 star reviews: 85 Total 3 star reviews: 8 Total 2 star reviews: 3 Total 1 star reviews: 12
97%would recommend these products
Slide 1 selected
876 reviews
  • GC
    George C.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Other, Functional Circuit Training
    Using For: Sport / Fitness, Gym Bag
    Rated 5 out of 5 stars
    Just The Right Size

    I got this bag because my larger KNKG bag was a bit large to lug around and fit into a locker.

    This one is just right; you have to squeeze things in a little but much more manageable.

    Was this helpful?
  • RD
    Roberto D.
    Verified Buyer
    Reviewing
    CORE Duffel Waxed Canvas Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Other
    Using For: Sport / Fitness
    Rated 5 out of 5 stars
    Waxed Canvas

    The bag well made. As advertised

    Was this helpful?
  • MC
    Michael C.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    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: Work, Every Day Carry
    Rated 5 out of 5 stars
    Well made

    Sturdy bag, use it for work samples and such. Perfect.

    Was this helpful?
  • DR
    David R.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit, Fight & Combat Sports, Weightlifting, Functional Circuit Training
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Perfect size

    Great gym! Fits all my stuff tons of small pockets for organizing and easily fits in the lockers. Best I’ve ever owned.

    Was this helpful?
  • RH
    Roger H.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Olympic Lifting, Functional Circuit Training, Fight & Combat Sports
    Using For: Gym Bag
    Rated 4 out of 5 stars
    CORE Medium Duffel

    I have really enjoyed this duffel, and to be honest, I was pleasantly surprised by the quality of the duffel. It is very well made with good sturdy material, it’s rigid enough (so far) to maintain its shape.

    It has plenty of room and a quite a few compartments of various sizes for equipment and personal items. In addition, I also purchased a divider for it; and this pairing go well together and keeps items well organized and in their place.

    Was this helpful?
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