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
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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
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 (865 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 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 865 reviews
Total 5 star reviews: 758 Total 4 star reviews: 84 Total 3 star reviews: 8 Total 2 star reviews: 3 Total 1 star reviews: 12
97%would recommend these products
Slide 1 selected
865 reviews
  • JG
    James G.
    Verified Buyer
    Reviewing
    CORE Duffel Waxed Canvas Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Functional Circuit Training, Weightlifting
    Using For: Gym Bag, Sport / Fitness, Every Day Carry
    Rated 5 out of 5 stars
    First Class product and packaging.

    This gym bag is incredibly nice. The shipping and presentation were also. Highly recommend picking one of these up if you want to have a stand out gym bag.

    Was this helpful?
  • ZA
    Zach 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? Bodybuilding
    Using For: Gym Bag, Sport / Fitness, Every Day Carry
    Rated 5 out of 5 stars
    Last bag for life

    I’ve been training in gyms for the past 27 years… through all of my competing in bodybuilding/powerlifting Ive gone through gym bags of all types from tons of different brands. Some were ok, most were absolutely sh*t… after getting this bag I can confidently say every other bag I’ve ever used was garbage compared to my waxed canvas duffel. This bad will likely be here long after I’m dead/gone. High quality craftsmanship & material. Buy this bag, you won’t regret it!

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  • TE
    Teresa E.
    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
    Rated 5 out of 5 stars
    Love these!

    I have had one for many years, so I ordered one for each of my 3 boys because they are gym rats like me! They are very tough! No other bag will do!

    Was this helpful?
  • SB
    Shannon B.
    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
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Excellent!

    Quality is excellent and came packaged beautifully! Great gift and will order again!

    Was this helpful?
  • AB
    Alan B.
    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
    Rated 5 out of 5 stars
    Powerlifting and Organization

    Love how organized this bag is with the dividers. I don’t get confused anymore where I store my headphones, chalk etc. It’s great having a dedicated attachment to store my Inzer lever belt as well. My old gym bag is still working fine but the core duffel has been such a huge quality of life upgrade that I don’t regret buying it.

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