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
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CORE Duffel Large 51L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (1,141 Reviews)
$180 $200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Green
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Green
Natty
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Duffel Divider
Duffel Divider
$40 $50
Matching Lifting Belt
Matching Lifting Belt
$50 $60
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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 1,141 reviews
Total 5 star reviews: 1k Total 4 star reviews: 104 Total 3 star reviews: 12 Total 2 star reviews: 4 Total 1 star reviews: 12
98%would recommend these products
Slide 1 selected
1,141 reviews
  • MJ
    Michael J. P.
    Verified Buyer
    Reviewing
    CORE Duffel Large 51L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training, CrossFit, Other
    Using For: Gym Bag, Every Day Carry
    Rated 4 out of 5 stars
    2nd 51L bag in my arsenal.

    This bag along with my first are used for the gym and training equipment. I also use them for weekend getaways. Hold the correct amount for the 3 days.

    Was this helpful?
  • MH
    Michael H.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Functional Circuit Training, Other
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Amazing!!

    I love it!! After years of using the old single compartment bag from the big brand competitor, it’s awesome to have everything in its place. The Core duffle is perfect for the gym but I can see using it for so much more. Compartments for all my stuff and more. Best of all my stinky sweaty cloths don’t have to live with the rest of my stuff. I got caught in the rain leaving the gym and all my gear stayed dry and secure. Perfect.

    I’m thinking about using the Core on my next weekend trip.

    Was this helpful?
  • AC
    Adrian C.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Other
    Using For: Gym Bag, Work, Sport / Fitness, Every Day Carry
    Rated 5 out of 5 stars
    A great duffle

    Awesome bag that can hold my shoes and free up some space in my roller board. And this duffle fits under the seats of the airlines (if ya don’t stuff it too full). Holds up to the rigors or airline travel. 10 out of 10 I’ll be getting another because the wife keeps trying to take it ..

    Was this helpful?
  • EL
    Emely L.
    Verified Buyer
    Reviewing
    CORE Duffel Large 51L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, CrossFit
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Great Duffle CrossFit Gym Bag

    I bought the bag for my husband for Father’s Day and he loves it. He’s had numerous gym bags over the years, but I’ve not seen him as excited as he was when he saw this KNKG 51L bag. He’s already getting it organized, likes the space and dividers to keep everything organized.

    Was this helpful?
  • JA
    John A.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Bodybuilding
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Love my new duffel!

    Perfect size for my needs. Bought the divider, an absolute must! Great product!

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