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
Birds eye view of empty large black KNKG CORE Duffel, showing pockets and compartments
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
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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 (953 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
$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 953 reviews
Total 5 star reviews: 842 Total 4 star reviews: 87 Total 3 star reviews: 8 Total 2 star reviews: 4 Total 1 star reviews: 12
97%would recommend these products
Slide 1 selected
953 reviews
  • J
    Jazzmine
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Been looking for a gym bag with structure for years! This bag is everything I needed :)

    Was this helpful?
  • MG
    Marina 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: Every Day Carry
    Rated 5 out of 5 stars
    THE BEST

    It’s amazing is a heavy duty material my husband loves it n he loved the compartments he said he waited along time for a bag like this one. When he opened it he was amazed by the material n the looks its really one of the best gift that he enjoyed n loved i made the greatest choice for Christmas this time !!!!!!!

    Was this helpful?
  • MK
    Mary K. P.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, Fight & Combat Sports
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Amazing!

    Came across this brand when I was searching for a top quality gym bag for my boyfriend and it was exactly what he needed. Fits his extra pair of shoes, boxing gloves, chains, and so much more. He’s gotten lots of compliments from it and I love knowing that it’ll last him a really long time!

    Was this helpful?
  • SB
    Sharon B.
    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: Sport / Fitness
    Rated 5 out of 5 stars
    Duffel Bag

    My son loves the duffel bag

    Was this helpful?
  • MH
    Mark 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
    Using For: Gym Bag
    Rated 5 out of 5 stars
    35L

    Great bag, a lot of extra pockets. Spacious enough for clothes and toiletries. Definitely my new gym bag!

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