CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L
CORE Backpack Waxed Canvas Medium 25L

CORE Backpack Waxed Canvas Medium 25L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (118 Reviews)
Size: Medium 25L
Mini 13L
Mini 13L
Medium 25L
Medium 25L
Large 33L
Large 33L
Color:
Black
Black
Desert
Desert
Green
Green
Natty
Natty
Limited Edition - Waxed Canvas: Traditional
Camo
Camo
Traditional
Traditional
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WAXED. WEATHERED. UNCOMPROMISING.

The CORE Backpack is built tough - with a water-resistant waxed canvas exterior inspired by the rugged, resilient spirit of the West. Over time, waxed canvas develops a vintage look, picking up the marks of your journey and building character with every use.

The unique external belt attachment keeps your lifting belt secure on the outside, freeing up valuable space inside the bag. With smart storage throughout, it’s made to back you through training, travel, and everything in between.

Featuring:

  • Water-resistant Scottish waxed canvas from Halley Stevenson.
  • Genuine Cow leather logo patch and zipper pulls.
  • External weightlifting belt attachment.
  • 16” internal laptop sleeve.
  • Sealed internal shoe compartment.
  • Dual bottle pockets. 
  • Packed in a sturdy keepsake box - perfect for gifting.
  • Genuine leather wallet & keyring included - Limited time only.

(Lifting belt sold separately)

KNKG bags are built to go the distance. Every piece is engineered with quality materials, precision craftsmanship, and real-world testing - so you can pack it to the brim without worrying about rips or failure.

This version of the CORE Backpack features a waxed canvas body - an ultra-durable cotton canvas impregnated with wax for water resistance. Waxed canvas develops a rugged, lived-in look over time, with marks and creases that add to its character. It delivers the same proven longevity as our ballistic materials, with a vintage feel that gets better the harder you use it.

This CORE backpack is made from:
• Water-resistant Scottish waxed canvas from Halley Stevenson (cotton, waxed finish)
• Genuine Cow leather logo patch & zipper pulls
• YKK zippers
• Ripstop nylon lining
• Nylon webbing

​
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NOT JUST DURABLE - DEPENDABLE
Built with a water-resistant waxed canvas shell, this limited edition CORE Duffel is crafted for those who aren't afraid to roll up their sleeves and get the work done. Every crease, mark, and scuff tells the story of work put in and limits pushed.

No shortcuts. No excuses. Just a bag that shows up like you do.

BUILT TO GO THE DISTANCE
Waxed canvas isn’t just for looks. It’s a proven material trusted for over a century. Water-resistant, tough by nature, and built to age with character. This isn’t a trend piece. It’s a workhorse built for the grind.
CORE DUFFEL
SIZE COMPARISON
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
Laptop Sleeve
Lifting Belt Size
MINI
15 L / 4 GAL
0.6 kg / 1.3 lbs
23cm / 9.1"
38cm / 15"
18cm / 7.1"
Not recommended
iPad
KNKG Belt
MEDIUM
35 L / 9.2 GAL
0.8 kg / 1.8 lbs
28cm / 11"
45cm / 17.7"
28cm / 11"
Size 10
Up to 13"
6.3" (W) - 45.7" (L)
LARGE
51 L / 13.4 GAL
1 kg / 2.2 lbs
32cm / 12.6"
50.8cm / 20"
32cm / 12.6"
Size 13
Up to 15"
6.7" (W) - 51.5" (L)
Capacity
Bag Weight
Height (H)
Width (W)
Depth (D)
Shoe Storage
Laptop Sleeve
Lifting Belt Size
MINI
15 L / 3.96 GAL
0.6 kg / 1.3 lbs
23cm / 9.1"
38cm / 15"
18cm / 7.1"
Not recommended
iPad
KNKG Belt
MEDIUM
35 L / 9.2 GAL
0.8 kg / 1.8 lbs
28cm / 11"
45cm / 17.7"
28cm / 11"
Size 10
Up to 13"
6.3" (W) - 45.7" (L)
LARGE
51 L / 13.4 GAL
1 kg / 2.2 lbs
32cm / 12.6"
50.8cm / 20"
32cm / 12.6"
Size 13
Up to 15"
6.7" (W) - 51.5" (L)
PACKAGED WITH PURPOSE
This isn't your average unboxing. Our limited edition Waxed Canvas Collection comes packaged in a premium keepsake box - making it the perfect gift or collector’s piece. For a limited time only, each set includes a genuine leather wallet and keyring.

FAQS

The main difference is the unique external weightlifting belt attachment - letting you carry your belt on the outside without sacrificing internal space. This version also features a 35L capacity and a reworked layout for streamlined storage. It's built from waxed canvas, a water-resistant cotton material that develops a rugged, vintage look with use - making it as tough as it is timeless.

Measure the widest point of your belt. 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.

4.8
Rated 4.8 out of 5 stars
Based on 118 reviews
Total 5 star reviews: 100 Total 4 star reviews: 13 Total 3 star reviews: 2 Total 2 star reviews: 1 Total 1 star reviews: 2
96%would recommend these products
Slide 1 selected
118 reviews
  • PP
    Preyash P.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Other
    Using For: Every Day Carry
    Rated 5 out of 5 stars
    Best purchase made.

    Backpack is absolutely perfect with the material and work that has been done . Very rugged and best for gym sessions as well as daily use. Coustomer service is excellent. Overall very pleased with their products.

    Was this helpful?
  • KD
    Kathleen D.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    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
    Huge success

    This was a gift for my son on his birthday. He opened the box and immediately transferred his gear to the new bag. He was very happy with the size and features of the bag. He took it to the gym the same day he received it.

    Was this helpful?
  • JN
    James N.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding
    Using For: Gym Bag
    Rated 5 out of 5 stars
    Worth it!

    I’m in Australia and had the bag shipped here. I’m about 3 weeks in to daily use as my gum bag and am glad I spent the money. Build quality is great, fits all my gear without any trouble, and looks great

    Was this helpful?
  • ML
    Matthew L.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, CrossFit, Other
    Using For: Gym Bag, Sport / Fitness, Every Day Carry, Work
    Rated 4 out of 5 stars
    Core Bag Review

    I needed a bag for work and hit the gym afterwards and Core bag fit all what I needed. The side pockets were able to hold my 40oz beast tumblers with ease. Plenty of room for my laptop , files and my gym clothes. The material of the bag and zippers will last for many years. I have tried other bags and I feel like I wasted my money because this bag does it all.

    Was this helpful?
  • BW
    Brandon W.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding
    Using For: Gym Bag, Every Day Carry, Work
    Rated 5 out of 5 stars
    Fantastic Bag!

    I’ve been looking for awhile for the perfect bag that accommodates what I need to go from office to gym or vice versa. I’ve purchased adidas, Nike, Gymshark and others. Nothing has lived up to what I’ve needed until my KNKG Core bag. I can store all my things AND it conveniently holds my lift belt without sacrificing bag space. It’s the final boss of gym bags.

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