CORE Backpack Mini 13L
Athlete in gym wearing green mini size KNKG CORE Backpack
green mini size KNKG CORE Backpack sitting on wooden surface
Front view of green mini size KNKG CORE Backpack with matching lifting belt
Side profile of green mini size KNKG CORE Backpack
Close up of drink bottle pocket on green mini size KNKG CORE Backpack
Athlete reaching for pre-workout drink in green mini size KNKG CORE Backpack side pocket
Back view of green mini size KNKG CORE Backpack on wooden surface inside gym
Internal laptop sleeve inside green mini size KNKG CORE Backpack
CORE Backpack Mini 13L
Close up of front pocket inside green mini size KNKG CORE Backpack
Female athlete wearing green mini size KNKG CORE Backpack
Mini size backpack on female and male athletes. Side by side comparison.
Three views of a person wearing a green CORE backpack labeled 'Large', 'Medium', and 'Mini' against a dark background.
Three views of green mini size KNKG CORE Backpack on a person against a black background

CORE Backpack Mini 13L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (232 Reviews)
$100
Size: Mini 13L
Mini 13L
Mini 13L
Medium 25L
Medium 25L
Large 33L
Large 33L
Color: Green
Black
Black
Green
Green
Natty
Natty
Desert
Desert
Mini 13L Black · Restocking Mid March 2026
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Matching Lifting Belt
Matching Lifting Belt
$40 $60
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MINI BACKPACK WITH LIFTING BELT STORAGE

Built for packing light. Our best selling CORE bags - compact in size yet loaded with function. 

The perfect gym floor bag without the bulk. Designed with a dedicated lifting belt sleeve, drink bottle holder, and multiple secure compartments.

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
• 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"

SAME STRENGTH, SAME FUNCTIONALITY, NEW COMPACT SIZE

Built for packing light - without sacrificing our signature external weightlifting belt attachment.

FAQS

The CORE Mini Duffel is specifically designed to fit the KNKG weight belt. We don’t recommend using it with other belt brands. If you’re using a different belt, we suggest upsizing to the MEDIUM or LARGE CORE Duffel instead.

No - we don't recommend the mini size for shoe storage. If you're packing shoes we recommend checking out the medium or large size duffel.
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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