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 (718 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
ADD ON AND SAVE
Duffel Divider
Duffel Divider
$39.95 $49.95
Lifting Belt
Lifting Belt
$39.95 $59.95
Notify Me When Available
Free Shipping Icon
FREE US SHIPPING
OVER $149
Military Discount Icon
MILITARY & EMERGENCY DISCOUNT
Free Return Icon
FREE FIRST
RETURN

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
​
​
​
​
​
​
​
​
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 718 reviews
Total 5 star reviews: 620 Total 4 star reviews: 77 Total 3 star reviews: 7 Total 2 star reviews: 3 Total 1 star reviews: 11
97%would recommend these products
Slide 1 selected
718 reviews
  • EV
    Eunice V.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, Olympic Lifting
    Using For: Gym Bag, Every Day Carry, Sport / Fitness, Work
    Rated 5 out of 5 stars
    Great bag

    My bag was great. Able to organize everything in the bag. Lots of room.

    Was this helpful?
  • AA
    Anna A.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Other
    Using For: Gym Bag, Sport / Fitness, Work
    Rated 5 out of 5 stars
    we’re obsessed

    there’s no nicer or more unique gym bag out there. I searched like crazy. couldn’t be happier. the dividers (extra) help me organize lifting clothes, dance gear, and a work outfit for when I am running from gym to work. you’ve got two more life long customers! I love that it holds my weight lifting belt.

    Was this helpful?
  • JW
    Jennifer W.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Amazing bag

    Its rugged and holds all the things needed for good lift session

    Was this helpful?
  • SK
    sam k.
    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, Work
    Rated 5 out of 5 stars
    best bag ever

    I’ve been using my bag for about a month now and the quality is beyond amazing. The bag feels like it could hold the weight of a car which is very re assuring when i have a lot of stuff in it and am walking for long periods with it. i also have the organizer in my bag which just makes it all that much better. i’m able to keep different things separated and organized efficiently. will probably be buying another bag from them soon for other uses!

    Was this helpful?
  • RA
    Rex A. H. J.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Finally the bag I wanted!

    Strong, useful space, love the sleeve on side for barbell squat pad. Divider is great! Also love that it holds its shape and doesn't collapse when its not full.

    Was this helpful?
Show More