CORE Duffel Large 51L
Man wearing large green CORE Duffel over shoulder inside gym setting
CORE Duffel Large 51L
Side view of large green CORE Duffel showing matching weight lifting belt stored inside belt sleeve
Side view of large green CORE Duffel
Flat lay of large green CORE Duffel surrounded by gym gear that fits inside duffel bag
Birds eye view of divider system inside of large green CORE Duffel packed with gym gear
Birds eye view of empty large green CORE Duffel, showing internal pockets and compartments
Birds eye view of large green CORE Duffel packed with gym gear
NOBULL sneakers packed inside large green CORE Duffel shoe compartment
Water bottle and shaker bottle packed inside large green CORE Duffel bottle pockets
Close up of large green CORE Duffel zippers and buckles
Man holding large green CORE Duffel by handles
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 (1,161 Reviews)
$200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Green
Black
Green
Natty
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Matching Lifting Belt
Matching Lifting Belt
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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 1,161 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
1,161 reviews
  • DD
    Danielle D.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit
    Rated 5 out of 5 stars
    DA BOMB!

    IF YOU NEED A BAG FOR THE GYM, THIS IS AWESOME. IT IS SMALL, BUT MIGHTY! WHEN I TRAVEL & WANT TO WORK OUT, I BRING THIS BAG... IT'S AWESOME AND JUST BIG ENOUGH FOR A LITTLE OF EVERYTHING!

    Was this helpful?
  • HB
    Helen B. O.
    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, Bodybuilding, CrossFit, Olympic Lifting
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Awesome bag!

    This is the perfect size! Amazing quality! So happy with my Cire 35L

    Was this helpful?
  • JG
    Joshua G.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting
    Using For: Gym Bag, Work
    Rated 5 out of 5 stars
    Great All Purpose Bag

    I purchased this bag primarily for gym clothes. I’ve found the bag to be of great quality which is easily seen and felt. The zippers, the seams and fabric materials are built well. Combined with the divider panels, the bag has many compartments to easily organize your gear and maximize the space.

    I highly recommend as a gym bag or weekend travel bag.

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  • 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.

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