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Front view of large green CORE Backpack with matching lifting belt attached
360* view of large green CORE Backpack
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Large green CORE Backpack padded back panel and shoulder straps
Internal view of large green CORE Backpack packed with laptop sleeve, hoodie, mobility accessories, shaker, drink bottle and EDC essentials
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Side by side comparison of large and medium CORE Backpack
Side by side comparison of large and medium sized CORE Backpack
Man wearing large green CORE Backpack

CORE Backpack Large 33L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (189 Reviews)
$190
Size: Large 33L
Mini 13L
Mini 13L
Medium 25L
Medium 25L
Large 33L
Large 33L
Color: Green
Desert
Desert
Black
Black
Green
Green
Large 33L Black · Restocking Mid Jan 2026
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Matching Lifting Belt
Matching Lifting Belt
$40 $60
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#1 GYM BACKPACK WITH LIFTING BELT STORAGE

  • External weightlifting belt attachment
  • 16” Internal laptop sleeve
  • Sealed internal shoe compartment
  • Dual bottle pockets

Do you even lift? If so, meet your new training partner. Say goodbye to your belt wasting space inside your bag, with this unique and specially designed lifting belt attachment that ensures bag functionality isn’t compromised whatsoever. The CORE Backpack is made for those who train hard and pack smart. 

(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 Backpack is made from:

• 500D nylon body material (PVC backing)

• YKK zippers

• Ripstop nylon lining

• Nylon webbing

​
CORE BACKPACK
SIZE COMPARISON
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
Laptop Sleeve
MINI
13 L / 3.4 GAL
0.8 kg / 1.8 lbs
35cm / 13.8"
25cm / 9.8"
15cm / 5.9"
Not recommended
iPad
MEDIUM
25 L / 6.6 GAL
1 kg / 2.2 lbs
50.8cm / 20"
30.5cm / 12"
17cm / 6.7"
Up to size 10
Up to 16"
LARGE
33 L / 8.7 GAL
1.1 kg / 2.4 lbs
53.3cm / 21"
31cm / 12.2"
20.1cm / 7.9"
Up to size 13
Up to 16"
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
Laptop Sleeve
MINI
13 L / 3.4 GAL
0.8 kg / 1.8 lbs
35cm / 13.8"
25cm / 9.8"
15cm / 5.9"
Not recommended
iPad
MEDIUM
25 L / 6.6 GAL
1 kg / 2.2 lbs
50.8cm / 20"
30.5cm / 12"
17cm / 6.7"
Up to size 10
Up to 16"
LARGE
33 L / 8.7 GAL
1.1 kg / 2.4 lbs
53.3cm / 21"
31cm / 12.2"
20.1cm / 7.9"
Up to size 13
Up to 16"

This backpack is designed for serious lifters who crave serious organization.

This gym bag works harder than you do. This is the best and most functional gym bag you can find.

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 (25L and 33L) 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. The CORE33 (Large) Backpack can fit a belt up to 6.3"/16cm wide. The CORE25 (Medium) Backpack can fit a belt up to 5.9"/15cm wide.

And yes! Lever belts will work with this bag.

The CORE25 (Medium) Backpack fits shoes up to size 10 US mens trainers/runners comfortably. The CORE33 (Large) Backpack fits up to size 13 US mens.

4.8
Rated 4.8 out of 5 stars
Based on 189 reviews
Total 5 star reviews: 164 Total 4 star reviews: 19 Total 3 star reviews: 3 Total 2 star reviews: 1 Total 1 star reviews: 2
97%would recommend these products
Slide 1 selected
189 reviews
  • JD
    John D.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    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
    Best gym backpack core 33L

    I’ve tried several other bags claiming my EDC for the gym would fit. Not one of them did. I was skeptical KNKG would be any different, everything was going to fit size 13w Hoka shoes, lifting straps, gloves, 10mm lever belt, beats headphones, knee sleeves, Sweat towel, lock, 40oz stainless steel water bottle. To my surprise everything fit with room to spare. Best build quality of any backpack I’ve had and I have gone through a few of them. I’ve been in the market for a new work laptop EDC backpack I think the conquer will be my next purchase. KNKG has a custom for life .Done with the other company’s.

    Was this helpful?
  • TH
    Tracy H.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Other
    Using For: Gym Bag, Sport / Fitness, Every Day Carry
    Rated 5 out of 5 stars
    Fits everything

    My grandson wanted this for all his school books and powerlifting gear. It all fits perfectly! Still with room to add more things. Great backpack!

    Was this helpful?
  • JF
    Joshua F.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    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
    Envy of the gym

    This bag not only fits all it is the talk the gym

    Was this helpful?
  • LL
    Lorenzo L.
    Verified Buyer
    Reviewing
    CORE Backpack Mini 13L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting
    Using For: Sport / Fitness, Gym Bag, Every Day Carry
    Rated 5 out of 5 stars
    Perfect Fit

    The pack is the perfect size for my coaching needs and a quick trip to the gym.

    Was this helpful?
  • GB
    Gylfi B.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Other
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Massive upgrade

    Went from a very basic bag that tightly fit my daily gear, now I can bring all of it so I am never caught without. The belt loop means I am bringing both my soft and hard belts. Plenty of space to fit and find whatever it is you need to bring with you.

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