CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L
CORE Duffel Medium 35L

CORE Duffel Medium 35L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (727 Reviews)
Size: Medium 35L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Black
Black
Black
Natty
Natty
Green
Green
Desert
Desert
Limited Edition - Waxed Canvas:
Camo
Camo
Traditional
Traditional
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Duffel Divider
Duffel Divider
$39.95 $49.95
Lifting Belt
Lifting Belt
$39.95 $59.95
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OUR BEST SELLING GYM DUFFEL WITH LIFTING BELT ATTACHMENT

  • 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 promise to be free of defects in material or workmanship within its practical lifetime. If there is a defect in materials or workmanship KNKG will repair or replace your bag, including free shipping.

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
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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)

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.

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 727 reviews
Total 5 star reviews: 628 Total 4 star reviews: 78 Total 3 star reviews: 7 Total 2 star reviews: 3 Total 1 star reviews: 11
97%would recommend these products
Slide 1 selected
727 reviews
  • EM
    Eric M.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Finally a framed gym bag

    My biggest complaints with my gym bag over the last 20 years was that it was sloppy, folded in the middle like a taco when slinged and never had dividers that would keep the sides up and keep my gear organized, everything mix around and tangle up in my bag when moving about. I'm retired Marine Corps and this bag is built tougher than any bag or pack I've ever been issued or bought. After loading and opening it up, I laughed and said my kids are going to be using this bag someday. The only thing I want to do to it is add some velcro to the outside so I can personalize it a bit with some of my patches. Ultimately, this bag will outlive you.

    Was this helpful?
  • MK
    Minji K.
    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
    incredible build quality

    Right out of the box I was amazed at the materials they used for this thing. For reference I own several backpacks that cost around $400 and I would say that this duffle's build quality is on par with those. I take it to the gym for every workout. Mine is in the natty colorway which looks incredible and the multiple pockets make organization easy. Would recommend this to anyone looking for a gym duffle or even a travel bag.

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  • J
    josue
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Just the perfect size.

    Was this helpful?
  • ZS
    Zach S.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    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
    Duffel bag

    Perfect size for consistent gym goers. Easily pack your daily items, change of clothes and a separate area for shoes. Quality of the material and zippers are exceptional as well as the shoulder strap and handles. Highly recommend and well worth the price!

    Was this helpful?
  • D
    Daniel
    Reviewing
    CORE Duffel Mini 15L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    This is a good quality product. It’s rugged with good quality stitching and tough ykk like zippers. I plan to buy a bigger size in the future.

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