CORE Backpack Mini 13L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (136 Reviews)
$99.95
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THE TOUGHEST MINI BACKPACK YOU'LL EVER MEET

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 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
• 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 136 reviews
Total 5 star reviews: 117 Total 4 star reviews: 14 Total 3 star reviews: 2 Total 2 star reviews: 1 Total 1 star reviews: 2
96%would recommend these products
Slide 1 selected
136 reviews
  • BF
    Brandon F.
    Verified Buyer
    Reviewing
    CORE Backpack Waxed Canvas Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, Other
    Using For: Gym Bag, Sport / Fitness
    Rated 4 out of 5 stars
    4.5 stars, not 4!

    It’s not quite 5 stars, buts it’s close and maybe I’m just being picky. Truly I’m leaving honest review as I really like this company and what they are making.

    Overall, I love it! The color is beautiful & unique from anything else in the gym realm. The light brown on the inside is also such a refreshing choice from other bag I’ve seen putting the neon colors on the inside. I feel this choice fits the style much better, but aesthetics aside, how does it function?

    Coming from someone who was using the 50l bag previously to a 25 I was skeptical, but found 25 to be just the right amount of space for a daily gym bag for all the things you’ll need that day.

    I’m a bigger guy and wear size 12-13 shoes…in case you’re wondering 12’s don’t fit great in the compartment but they will if you do some angling. OR if you wear barefoot shoots or very flexible trainers it will work.

    I usually manage my shoes, various rubber bands, knee sleeves (in laptop compartment) jump rope , towel or sweatshirt, 24oz bottle, belt, AirPods, wrist wraps, liquid chalk, smelling salts (for the RARE occasion ;) ), heel wedges, iPhone charger, phone and gym notebook(other water bottle slip pocket), and maybe a protein bar with, with a little room to spare.

    I found myself using the shoe compartment for clothing or other things I don’t always need, and the rest for my shoes. EvergoodS makes an awesome packing cube that fits this perfectly FYI

    A very helpful thing I used was one of the dividers from the…

  • JG
    Jose 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
    Perfect Size

    perfect size. i don’t carry a lot of items but a good amount of items to were it was annoying walking with everything in your pocket or neck also just throwing your hoodie on the ground. perfect size to have everything in your bag and just walk to your other workout instead of picking 1 items up at a time.

  • AC
    Austin C.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Functional Circuit Training, CrossFit
    Using For: Work, Every Day Carry, Sport / Fitness, Gym Bag
    Rated 5 out of 5 stars
    Durability Meets Comfort

    The KNKG Backpack is built to last—its durability really stands out. It offers plenty of storage space without feeling bulky, and the sleek, clean design makes it versatile for everyday use. Comfortable to wear for long periods, it strikes the perfect balance of function and style.

  • JS
    Jasper S.
    Verified Buyer
    Reviewing
    CORE Backpack Mini 13L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Olympic Lifting
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Awesome compact gym bag

    Perfect size for everyday workouts—fits shoes, clothes, and a water bottles without being bulky. The material feels durable, zippers are smooth, and it’s easy to clean. Stylish, practical, and just right for the gym!

  • RL
    Robert L.
    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
    Great bag even better customer service

    Great bag even better customer service