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
Close up of KNKG Waxed Canvas Backpack with water droplets
Close up of back panel of KNKG Waxed Canvas Backpack
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.
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CORE Backpack Waxed Canvas Medium 25L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (167 Reviews)
$187 $250
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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Matching Lifting Belt
Matching Lifting Belt
$40 $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)

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 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"
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.

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 167 reviews
Total 5 star reviews: 143 Total 4 star reviews: 19 Total 3 star reviews: 2 Total 2 star reviews: 1 Total 1 star reviews: 2
97%would recommend these products
Slide 1 selected
167 reviews
  • RA
    Robin A.
    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
    Core

    Awesome

    Was this helpful?
  • F
    Fabian
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    Rated 4 out of 5 stars
    4 Stars

    Awesome bag but a little small. A bigger version would be great.

    Was this helpful?
  • BD
    Bobby d.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting
    Using For: Every Day Carry
    Rated 5 out of 5 stars
    Best bag ever

    Couldn’t be more pleased with the bag heavy duty material constructed very well. The bag is here to last.!!!

    Was this helpful?
  • CM
    Charles M.
    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
    Using For: Gym Bag, Every Day Carry
    Rated 5 out of 5 stars
    A Bag that Will Pass the Test of Time!

    The Core Backpack is everything I hoped it would be. Having passed the 3/4 century point in my life. I have worked out in more gyms during the past 60+ years than I can recount. The KNKG Core Backpack is, without a doubt, the very best gym bag I have been privileged to use and I am certain it is a Gym Pack that will someday be passed on to my heirs! The waxed canvas it is made of is some of the best that I have seen and the construction is flawless. Gentlemen, the Waxed Canvas Core Backpack is a Bag you can be proud to pass on to your customers.

    Was this helpful?
  • MH
    Mark H.
    Verified Buyer
    Reviewing
    CORE Backpack Large 33L
    I recommend this product
    What type of training is your KNKG bag supporting you with? Weightlifting
    Using For: Every Day Carry
    Rated 5 out of 5 stars
    Love bag

    Bag was gift for friend pictured who won bench press 462lbs

    Was this helpful?
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