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.

CORE Backpack Waxed Canvas Medium 25L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (136 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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Lifting Belt
Lifting Belt
$39.95 $59.95
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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 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…

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  • 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.

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  • 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.

    Was this helpful?
  • 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!

    Was this helpful?
  • 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

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