CORE Backpack Large 33L
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Large green CORE Backpack padded back panel and shoulder straps
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Side by side comparison of large and medium sized CORE Backpack
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CORE Backpack Large 33L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (232 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
33L Black · Restocking Mid March 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 232 reviews
Total 5 star reviews: 196 Total 4 star reviews: 28 Total 3 star reviews: 5 Total 2 star reviews: 1 Total 1 star reviews: 2
97%would recommend these products
Slide 1 selected
232 reviews
  • KH
    Kara H.
    Verified Buyer
    Reviewing
    CORE Backpack Mini 13L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Bodybuilding, Weightlifting, None - I don't use my bag for training
    Using For: Gym Bag, Every Day Carry, Sport / Fitness, Work
    Rated 5 out of 5 stars
    Perfect bag

    I wanted a mini backpack that could fit all my things but also have side pockets for water bottles/bottles. This was the perfect size bag plus has comfortable straps, awesome compartment zips, and all the things I needed in a small bag. Perfect for my Disney trip too

    Was this helpful?
  • PY
    Patrick Y. C.
    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
    My second bag

    This is my second KKNG back pack. I loved the medium size so much, I bought a large.

    Was this helpful?
  • ZM
    Zachariah M.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Great gym backpack

    Love this backpack. The amount of space is more than enough. The shoe compartment fits my 10.5 perfect. The belt loop is a great design. And the two quick access pockets are perfect for things like wallet, phone, keys, etc.

    Was this helpful?
  • S
    steady
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Great quality bag got it for a gym bag but it’s holding up to muck more then that its a great size and well made only thing id change is if it had pleats in the smaller pockets so they could expand a bit more. Didn’t relize they had a military discount when i bought it but im glad i paied full price since its suck good quality. The shipping was also quick and I enjoyed the hand writen thankyou that came with it. Overall great pack 10/10

    Was this helpful?
  • SS
    Stephen S.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Core backpack

    Great product. Works great for gym bag

    Was this helpful?
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