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 (264 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 264 reviews
Total 5 star reviews: 224 Total 4 star reviews: 30 Total 3 star reviews: 6 Total 2 star reviews: 2 Total 1 star reviews: 2
96%would recommend these products
Slide 1 selected
264 reviews
  • GP
    Gary P.
    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
    Rated 5 out of 5 stars
    Perfectly Beefy Bag

    I got my hands on this bag and instantly knew it was a top notch product. Immediately I could tell the materials used were intended to keep this bag going for a lifetime. Basically, nothing about this seems cheaply done or even meant to build a “quantity” type of item. Quality all the way and I will be recommending KNKG to anyone when an opportunity presents.

    Was this helpful?
  • JH
    Justin H.
    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, Functional Circuit Training, Bodybuilding, CrossFit, Olympic Lifting
    Using For: Sport / Fitness, Gym Bag
    Rated 5 out of 5 stars
    I Was This Many Years Old When I Learned Backpacks Could Do This

    I loved my old gym duffel the way you love a golden retriever that sheds everywhere and knocks over lamps — deeply, unconditionally, and at growing cost to my shoulder. It held my shoes, clothes, belt, and forty pounds of “just in case,” but hauling it felt like rescuing a golden retriever from a well.

    Then the KNKG Core Backpack in waxed canvas walked into my life and I felt like someone finally told me the M&M’s go IN the popcorn. A revelation.

    This bag holds my size 12s in their own sealed shoe dungeon, a full change of clothes, and my lifting belt clipped smugly outside like it’s showing off. Enough pockets that my stopwatch, headphones, wallet, and keys have never once had an awkward run-in. It’s organized, handsome, and aging like it’s trying to win a rugged-but-emotionally-available contest. Same, bag. Same.

    I no longer carry forty pounds like I’m auditioning for strongman. I carry one gorgeous, capable backpack, and I genuinely could not tell you where my old duffel lives now. Attic? Witness protection? We don’t talk about it.

    Every day I pick this thing up and feel a small, ridiculous flutter of gratitude. 10/10. Would let it hold my belt again.

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

    Good quality!

    Was this helpful?
  • IM
    Isidor M.
    Verified Buyer
    Reviewing
    CORE Backpack Mini 13L
    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
    Great small backpack

    Took it on a trip with me and it's the best everyday backpack i could pick: tough, good looking, perfect size.

    Was this helpful?
  • RC
    Robert C.
    Verified Buyer
    Reviewing
    CORE Backpack Mini 13L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding
    Using For: Gym Bag, Every Day Carry
    Rated 5 out of 5 stars
    Core mini

    I like the bad but wish I had gotten a larger version or a duffle bag instead. I can barely put my shoes and clothes in there. If I didn't carry shoes with me to change at work it'd be a good size.

    Was this helpful?
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