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 (226 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 226 reviews
Total 5 star reviews: 190 Total 4 star reviews: 28 Total 3 star reviews: 5 Total 2 star reviews: 1 Total 1 star reviews: 2
96%would recommend these products
Slide 1 selected
226 reviews
  • B
    Brittney
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Ive had my eye on this backpack for some time & so far i like it.

    Was this helpful?
  • SG
    Sergio G.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    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
    Medium bag

    Love the bag . I use it everytime I workout . I’m happy about the warranty . I just wish the belt was available . In my size ( the black one ).

    Was this helpful?
  • NS
    Nick S.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training, CrossFit, Olympic Lifting, Bodybuilding
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    Great product, even greater interaction

    I original bought a bag from KNKG that ended up having a tear in the top pocket of the bag. After reaching out to customer service and interacting with Taylor, I was able to get the Core Backup Medium 25L, which has been fantastic for my workouts! I couldn’t be more grateful and excited to use it for a long time!

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  • LS
    Lauren S.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, CrossFit, Functional Circuit Training, Olympic Lifting
    Using For: Gym Bag, Sport / Fitness
    Rated 5 out of 5 stars
    The only backpack we agree on

    After decades of going through dozens of backpacks, this is the ONLY ONE that my husband (6', 210lbs) and I (5' 3", 140lbs) agree on. It is our absolute favorite not just for the thoughtful array of pockets, but because the fit works perfectly for both of our very different frames. We're each able to adjust the straps and load up the packs so that the weight is evenly distributed. Well done KNKG! We could not be more impressed!

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  • DM
    Darryl M.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training
    Using For: Gym Bag
    Rated 4 out of 5 stars
    Molle

    Almost like being back in service, fits all my gear and comfortable on the shoulder

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