CORE Duffel Large 51L
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
Close up of large black KNKG CORE Duffel zippers and buckles
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
10% OFF | SAVE $20

CORE Duffel Large 51L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (1,256 Reviews)
$180 $200
Size: Large 51L
Mini 15L
Mini 15L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color: Black
Black
Green
ADD ON AND SAVE
Duffel Divider
Duffel Divider
$50 $60
Matching Lifting Belt
Matching Lifting Belt
$50 $60
Notify Me When Available
Free Shipping Icon
FREE US SHIPPING
OVER $199
Military Discount Icon
MILITARY & EMERGENCY DISCOUNT
Return Icon
EASY RETURNS
& EXCHANGES

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 1,256 reviews
97%would recommend these products
Slide 1 selected
1,256 reviews
  • GP
    Grayson P.
    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, CrossFit
    Using For: Gym Bag, Every Day Carry
    Rated 5 out of 5 stars
    Bad A$$ bag

    Plenty of room and still has extra space if needed. Great size for multiple shakers and change of clothes for all gym stuff and change of clothes. Solid purchase! Looks great and look forward to many years of wear on it for seasoning.

    Was this helpful?
  • M
    mike
    Reviewing
    CORE PRO Duffel Large 51L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    loving my gym bag. Well made. I have gone through a gym bag a year but was buying cheap bags. The way this bag is built, I think this may be the last bag I have to buy. lots of room and plenty of pockets to store things.

    Was this helpful?
  • W
    William
    Reviewing
    CORE Duffel Waxed Canvas Medium 35L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    These bags are so well designed and pit together, im actually blown away. I wS worried the medium might be too big but its perfect- even the sizing of the bags is different in the best way possible.

    Was this helpful?
  • LW
    Luke W.
    Verified Buyer
    Reviewing
    CORE PRO Duffel Mini 15L
    I recommend this product
    Rated 5 out of 5 stars
    Excellent gym & recovery bag

    I’ve been using the CORE PRO Duffel Mini as my everyday bag for lifting, sauna, and cold plunge, and it’s honestly been perfect. It’s compact, easy to keep well organized, and holds everything I need for a full gym and recovery session. The quality feels excellent, and I constantly get compliments on it at the gym. A buddy of mine had one, after seeing his I ordered one, (and glad I did) easily one of my favorite pieces of gear I’ve bought this year. If you’re considering getting one, buy it! You won’t be disappointed.

    Was this helpful?
  • M
    Mark
    Reviewing
    CORE Duffel Waxed Canvas Mini 15L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Excellent quality bag. I love the camo pattern and size of the bag is perfect to carry a few necessary items for the gym.

    Was this helpful?
Show More