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 (1,119 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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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 1,119 reviews
Total 5 star reviews: 990 Total 4 star reviews: 101 Total 3 star reviews: 12 Total 2 star reviews: 4 Total 1 star reviews: 12
97%would recommend these products
Slide 1 selected
1,119 reviews
  • AG
    Alicia G.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Functional Circuit Training, Weightlifting
    Using For: Gym Bag, Every Day Carry
    Rated 5 out of 5 stars
    Love this bag

    This is my second Core mini purchase. My dad saw mine and loved it and wanted it for travel, so I got it for him. He loves it because it holds just enough for a long weekend. I mainly use mine for gym purposes, but have used it as a carry-on when traveling too. I wish it had a strap across the back to attach it to my suitcase handle, but otherwise, this bag is perfect.

    Was this helpful?
  • BB
    Brett B.
    Verified Buyer
    Reviewing
    CORE Duffel Waxed Canvas Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting
    Using For: Sport / Fitness
    Rated 5 out of 5 stars
    Solid Gear

    Love the core waxed duffle, well made and well thought out, there’s a pocket for everything! I purchased it for a gym bag but will use it for light travel as well.

    Was this helpful?
  • MB
    Mario 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, Sport / Fitness
    Rated 5 out of 5 stars
    Great looking bag

    Love the color and feels lux and durable. At first I thought the bag would be too big and almost ordered the mini but it’s the perfect size. Fits everything I need!

    Was this helpful?
  • FT
    Fletcher T.
    Verified Buyer
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training
    Using For: Sport / Fitness, Gym Bag
    Rated 5 out of 5 stars
    Great size

    Foods everything i need for the gym. Doesn't take up needless space being bulky. Very pleased with the quality as well.

    Was this helpful?
  • NA
    Nick A.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Fight & Combat Sports, Other
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Big without being too big.

    The bag is well made, and well thought out. It can hold a lot without being to cumbersome. Can easily walk through the gym door with my 35L and the mini. Great products all the way around. Customer service is top notch too!

    Was this helpful?
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