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 (1,003 Reviews)
$200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Green
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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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 1,003 reviews
Total 5 star reviews: 886 Total 4 star reviews: 91 Total 3 star reviews: 10 Total 2 star reviews: 4 Total 1 star reviews: 12
97%would recommend these products
Slide 1 selected
1,003 reviews
  • KH
    Kathy 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
    No buyer's remorse here - LOVE my CORE

    Absolutely love my new duffel. I hee-haw'd for a bit because it wasn't an inexpensive investment, but I can honestly say I didn't have a moment of buyer's remorse when I unpacked it. The quality is top-notch and I can see why the offer a lifetime guarantee ... nothing is going to get to this bad boy!

    Was this helpful?
  • TD
    TONY D.
    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, Bodybuilding
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Perfect gym bag for me

    No complaints at all, the perfect bag for me

    Was this helpful?
  • J
    Jason
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Solid and ready! I cannot wait to use this bag for work and the gym!!!

    Was this helpful?
  • TR
    Tracy R.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    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
    Perfect size

    I bought the mini bag originally as a personal item bag for when I fly and it's the perfect size to fit under the seat in front of me. I also use it for my lighter gym days which is great. I love the durability of these bags and the zippers work great.

    While I'm here, I have had the medium bag for a couple of years now and I love it, except for one aspect, the belt holder. I love the feature of the belt holder except that the velcro had started tearing up the stitching and edges of my customized lifting belt. I had to go to the craft store and get some materials to modify the belt holder to prevent it from destroying my belt further. I spent a lot of money on my belt because it's an investment in my opinion. I understand the concept of the velcro, but I don't see the need for it. Other than that, I love both of my bags.

    Was this helpful?
  • RA
    Robin A. R.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, CrossFit, Olympic Lifting
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    KNKG is the best

    This is the most organized I have been in a long time. The bag has many pockets outside and inside. I carry two pairs of shoes, lifting belt, wrist bands, knee sleeve (2 pair), grips (3), water bottle. I also purchased the dividers for this bag, they our the best to keep everything organized. So glad I finally purchased.

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