CORE Backpack Waxed Canvas Medium 25L
Man wearing KNKG Waxed Canvas Backpack in barn gym
Man wearing KNKG Waxed Canvas Backpack in front of wooden background
Front view of KNKG Waxed Canvas Backpack sitting on box with drink bottles in side pockets.
KNKG Waxed Canvas Backpack with leather wallet sitting inside wooden box packaging.
Man and women wearing KNKG Waxed Canvas Backpack side by side
KNKG Waxed Canvas Backpack sitting on wooden box with matching weightlifting belt wrapped around backpack
KNKG Waxed Canvas Backpack sitting on wooden box with weightlifting belt and bottles in side pockets
KNKG Waxed Canvas Backpack side view sitting on wooden box inside barn gym
Back view of KNKG Waxed Canvas Backpack showing leather logo
Leather wallet inside front pocket of KNKG Waxed Canvas Backpack
Front pocket of KNKG Waxed Canvas Backpack packed with wallet, keys and EDC essentials
Sneakers inside bottom shoe compartment of KNKG Waxed Canvas Backpack
Person placing a laptop into KNKG Waxed Canvas Backpack
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Close up of leather logo patch on KNKG Waxed Canvas Backpack
Person wearing KNKG Waxed Canvas Backpack with water bottles in a gym setting
Person putting a white sneaker into KNKG Waxed Canvas Backpack on a wooden surface.
Person removing weight lifting belt from KNKG Waxed Canvas Backpack lifting belt sleeve.

CORE Backpack Waxed Canvas Medium 25L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (273 Reviews)
$290
Size: Medium 25L
Mini 13L
Mini 13L
Medium 25L
Medium 25L
Color:
Black
Natty
Limited Edition - Waxed Canvas: Traditional
Tan
Black
Traditional
Camo
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Matching Lifting Belt
Matching Lifting Belt
$50 $60
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TRADITIONAL WAXED CANVAS BACKPACK FOR EVERYDAY CARRY

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)

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.

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

​

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 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
1.1 kg / 2.4 lbs
50.8cm / 20"
30.5cm / 12"
17cm / 6.7"
Up to size 10
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
1.1 kg / 2.4 lbs
50.8cm / 20"
30.5cm / 12"
17cm / 6.7"
Up to size 10
Up to 16"
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.

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.

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.

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 273 reviews
96%would recommend these products
Slide 1 selected
273 reviews
  • JC
    Joshua C.
    Verified Buyer
    Reviewing
    CORE PRO Backpack Large 33L
    I recommend this product
    Rated 5 out of 5 stars
    Great for Commuting Military

    I’ve been really happy with this backpack for my day-to-day commute to the Pentagon. It has plenty of room without feeling overly bulky, and I can comfortably fit my lunch box, gym gear, and other daily essentials inside. One of the biggest positives for me is that it also meets military uniform requirements, so I can carry it while in uniform without worrying about compliance. It’s comfortable, practical, and has been a great all-around commuter bag. Definitely recommend it for anyone looking for a solid work and gym backpack.

    Was this helpful?
  • EA
    Ethan A.
    Verified Buyer
    Reviewing
    CORE Backpack Medium 25L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Other
    Using For: Gym Bag, Every Day Carry, Sport / Fitness
    Rated 4 out of 5 stars
    Great size and highly durable

    The medium 25L bag feels like a standard sized backpack. Has a good amount of pockets with plenty of room. It's a very durable bag. I also love the Belt holder. My only complaint is that since I have a small waist, my smaller belt makes using said room and pockets slightly harder to access when my belt is on the belt holder.

    Was this helpful?
  • JR
    Johnny R.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding
    Using For: Every Day Carry, Sport / Fitness, Gym Bag
    Rated 5 out of 5 stars
    Great!

    Solid fit for the gym spacious and lots of compartments for your gym accessories!

    Was this helpful?
  • J
    Jonathan
    Reviewing
    CORE Backpack Waxed Canvas Medium 25L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    This thing is perfect. Wish you made this in large with waxed canvas. I bought the waxed mini duffel as well and love them both.

    Was this helpful?
  • JG
    Justice G.
    Verified Buyer
    Reviewing
    CORE PRO Backpack Large 33L
    I recommend this product
    Rated 5 out of 5 stars
    Durable, spacious, well designed

    As always, KNKG has knocked it out of the park. The redesign keeps all of the best aspects of the CORE bag, while streamlining small but meaningful features such as the top pocket, and the side waterbottle pockets. Also, the expanded velcro patch area is fun.

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