CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L
CORE Duffel XPAC Medium 35L

CORE Duffel XPAC Medium 35L

4.8
Rated 4.8 out of 5 stars
4.8 Stars (1,274 Reviews)
$300
Size: Medium 35L
Mini 15L
Mini 15L
Small 25L
Small 25L
Medium 35L
Medium 35L
Large 51L
Large 51L
Color:
Mud
Black
Limited Edition: X-PAC
X-PAC
ADD ON AND SAVE
Notify Me When Available
Free Shipping Icon
FREE US SHIPPING
OVER $199
Military Discount Icon
MILITARY & EMERGENCY DISCOUNT
Return Icon
EASY RETURNS
& EXCHANGES

LIMITED EDITION X-PAC CORE DUFFEL

Technical. Durable. Weather resistant. 

Same CORE Duffel functionality. A completely different material.

Built with X-PAC® X42 — a high-performance laminate developed from advanced sailcloth technology. Born from materials engineered to perform in demanding marine environments, X-PAC applies the same principles of strength, low weight, stability and protection from the elements to everyday carry.

X42 is built around a tough 420-denier nylon face, reinforced with X-PAC’s distinctive X-PLY® fibre grid and bonded to a waterproof film backing. The result is a material that is highly durable, abrasion resistant, lightweight for its strength and built to handle wet conditions.

That visible X-pattern isn’t just for looks. The X-PLY® reinforcement helps add structure, control stretch and reinforce the fabric under load.

FEATURING:

  • 420D nylon face fabric
  • Reinforced X-PLY® construction
  • Waterproof film backing
  • High abrasion and tear resistance
  • Excellent strength-to-weight ratio
  • Distinctive technical X-PAC finish
  • Dual bottle pockets
  • 16” Internal laptop sleeve
  • Sealed shoe compartment
  • External lifting belt attachment

 

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.

Our bags are meticulously designed to stand up to the test of time. We utilize durable materials, coupled with top-notch craftsmanship and rigorous testing, resulting in the toughest bags in the game. You can confidently pack your bag to its maximum capacity without worrying about it stretching or tearing.

The X-PAC CORE Duffel is made from:

• 420D nylon face fabric with X-PLY® fibre grid 

• Waterproof film backing

• YKK zippers

• Ripstop nylon lining

• Nylon webbing

• Powder-coated steel buckles

​

BORN FROM SAILCLOTH. BUILT FOR MORE.

X-PAC® has its roots in high-performance sailcloth, engineered to withstand demanding conditions where strength, weight and weather resistance matter. Using X-PAC® X42, this limited edition CORE Duffel brings that same performance-driven construction to your everyday carry. Tough, lightweight and highly water-resistant, it’s built to take on hard training, daily use and whatever comes next.
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
1.2 kg / 2.6 lbs
23cm / 9.1"
38cm / 15"
18cm / 7.1"
Not recommended
iPad
KNKG Belt
SMALL
25 L / 6.6 GAL
1.4 kg / 3.1 lbs
25cm / 9.8"
40cm / 15.7"
25cm / 9.8"
Size 10
Up to 14"
4.5" (W) - 45" (L)
MEDIUM
35 L / 9.2 GAL
1.6 kg / 3.5 lbs
28cm / 11"
45cm / 17.7"
28cm / 11"
Size 10
Up to 16"
6.3" (W) - 45.7" (L)
LARGE
51 L / 13.4 GAL
1.8 kg / 4.0 lbs
32cm / 12.6"
50.8cm / 20"
32cm / 12.6"
Size 13
Up to 16"
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 / 4 GAL
1.2 kg / 2.6 lbs
23cm / 9.1"
38cm / 15"
18cm / 7.1"
Not recommended
iPad
KNKG Belt
SMALL
25 L / 6.6 GAL
1.4 kg / 3.1 lbs
25cm / 9.8"
40cm / 15.7"
25cm / 9.8"
Size 10
Up to 14"
4.5" (W) - 45" (L)
MEDIUM
35 L / 9.2 GAL
1.6 kg / 3.5 lbs
28cm / 11"
45cm / 17.7"
28cm / 11"
Size 10
Up to 16"
6.3" (W) - 45.7" (L)
LARGE
51 L / 13.4 GAL
1.8 kg / 4.0 lbs
32cm / 12.6"
50.8cm / 20"
32cm / 12.6"
Size 13
Up to 16"
6.7" (W) - 51.5" (L)

X-PAC CORE DUFFEL FAQ

What is X-PAC?
X-PAC is a technical performance fabric with roots in high-performance sailcloth. Its laminated construction combines strength, structure and water resistance while remaining lightweight. Originally engineered to handle demanding conditions on the water, it has become a trusted material for premium outdoor and performance gear.
How big is the X-PAC CORE Duffel Medium?
The Medium CORE Duffel has a 35L capacity and measures approximately 28 × 45 × 28 cm. It gives you plenty of room for training gear without stepping up to an oversized duffel.
Is the X-PAC CORE Duffel waterproof?
X-PAC is highly water resistant and helps protect your gear from rain, splashes and everyday exposure to moisture. The complete duffel is not designed to be fully waterproof or submersible, as water can still enter through seams and zippers.
Does the Medium CORE Duffel have shoe storage?
Yes. The Medium CORE Duffel includes a dedicated shoe compartment designed to keep footwear separated from the rest of your training gear. It accommodates shoes up to approximately US size 10.
What can I fit inside the 35L CORE Duffel?
The 35L Medium is built for everyday training and can comfortably carry clothing, shoes, a towel, lifting accessories, toiletries and other gym essentials. It's a versatile middle-ground size for athletes who carry more than the basics without needing our largest duffel.
Why choose X-PAC over traditional nylon?
X-PAC gives the CORE Duffel a more technical feel with excellent strength, water resistance and a structured construction. Its distinctive laminated surface and reinforced grid also give the bag a completely different look from our traditional fabrics.
Is X-PAC durable?
Yes. X-PAC was developed for environments where strength and reliability matter. Its multi-layer construction provides excellent resistance to everyday wear while maintaining its shape and structure through demanding training, travel and daily use.
Can I use the X-PAC CORE Duffel for travel?
Absolutely. The 35L size works well for the gym, overnight trips and everyday travel. Carry-on requirements vary between airlines, so we recommend checking your airline's current baggage dimensions before flying.
4.8
Rated 4.8 out of 5 stars
Based on 1,274 reviews
97%would recommend these products
Slide 1 selected
1,274 reviews
  • JH
    Justin H.
    Verified Buyer
    Reviewing
    CORE Duffel Large 51L
    I recommend this product
    What type of training is your KNKG bag supporting you with? CrossFit, Weightlifting, Olympic Lifting, Functional Circuit Training, Other
    Using For: Gym Bag, Work, Sport / Fitness
    Rated 5 out of 5 stars
    Perfect bag for a 3 plus day trip!

    This is my second KNKG bag. My first one is my go to gym bag. This one I got to have ready to go for emergent out of town work assignments. I work for the electric utility and get sent out to restore power outages. I had been searching for a high quality bag to keep stocked and ready to go when the storms hit. This bag has met and surpassed all my expectations. It’s made of high quality material and craftsmanship. The best part is it easily holds enough closed for 3 to 4 days of clothes. Overall I would highly recommend this bag for any application.

    Was this helpful?
  • B
    Bastian
    Reviewing
    CORE PRO Duffel Medium 35L
    I recommend this product
    Rated 5 out of 5 stars
    5 Stars

    Best gym and fitness instructor bag. Lots of pockets even without dividers.

    Was this helpful?
  • JF
    Jose F.
    Verified Buyer
    Reviewing
    CORE PRO Duffel Large 51L
    I recommend this product
    Rated 5 out of 5 stars
    Awesome

    Bag has been great. All my gear well organized, the dividers a must have. My loadout is heavy and the shoulder strap is wide and comfortable. Best duffel I’ve ever owned. Need to get another for travel.

    Was this helpful?
  • MB
    Michael B.
    Verified Buyer
    Reviewing
    CORE Duffel Waxed Canvas Medium 35L
    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
    Solid bag

    It is a pretty great bag. I’m glad I did not get the next size up. I needed durability and that is what I got with this product.

    Was this helpful?
  • BT
    Bruen T.
    Verified Buyer
    Reviewing
    CORE Duffel Medium 35L
    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
    Core 35L

    Great bag with everything I was looking for as a powerlifter, everything has its own pocket from wraps, straps and sleeves with lots of room left for additional things

    Was this helpful?
Show More

X-PAC Duffel Built for Training & Everyday Carry

The KNKG X-PAC CORE Duffel combines the proven functionality of the CORE gym bag with X-PAC X42, a technical performance material with roots in high-performance sailcloth. Built for training, travel and everyday use, its 35L capacity gives you space for gym gear, shoes, clothing and training essentials without the bulk of an oversized duffel.

Read more Read less

Built with X-PAC X42

X-PAC is a technical laminated material developed from high-performance sailcloth technology. Its multi-layer construction combines durability, structure and water resistance in a material designed to perform through demanding everyday use.

X42 gives the CORE Duffel its distinctive technical appearance, including the visible reinforcement grid associated with X-PAC fabrics. The structured material helps the duffel hold its shape while adding protection for the gear you carry between training, work and travel.

35L Gym Duffel with Dedicated Shoe Storage

The Medium CORE Duffel is designed around the gear athletes carry every day. Its 35L main compartment provides room for training clothes, lifting accessories, a towel, toiletries and other gym essentials, while a dedicated shoe compartment helps keep footwear separated from the rest of your gear.

At 35 litres, it sits in the middle of the CORE Duffel range, delivering enough capacity for a full training setup while remaining practical for everyday trips to the gym.

Made for Training, Travel and Everyday Use

The X-PAC CORE Duffel is purpose-built for training, but its versatility extends well beyond the gym. The 35L capacity makes it equally useful for overnight trips, weekends away, sports and everyday carry when you need more room than a backpack.

X-PAC's water-resistant construction adds another layer of protection when moving through changing conditions, helping shield your gear from light rain, splashes and everyday moisture.

A Technical Take on the CORE Gym Duffel

The X-PAC edition takes the recognizable functionality of the KNKG CORE Duffel and gives it a more technical material construction. X-PAC X42 delivers a structured, performance-driven finish for athletes who want a durable gym duffel with a distinctive look.

From early training sessions to weekends away, the X-PAC CORE Duffel is built to carry the gear you rely on and keep it organized wherever you're headed.

X-PAC CORE Duffel Medium Details

  • Capacity: 35L / 9.2 gal
  • Dimensions: 28 × 45 × 28 cm
  • Size: Medium
  • Shoe storage: Dedicated shoe compartment
  • Shoe fit: Designed to fit shoes up to approximately US size 10
  • Primary use: Gym, training, sport and travel
  • Outer material: X-PAC X42 technical laminate
  • Weather protection: Water-resistant outer material

Frequently Asked Questions

What is X-PAC?

X-PAC is a technical laminated performance material with roots in high-performance sailcloth. Its layered construction is designed to combine strength, structure and water resistance, making it well suited to demanding bags and performance gear.

Is the X-PAC CORE Duffel waterproof?

X-PAC X42 is highly water-resistant rather than completely waterproof. The material helps protect your gear from light rain, splashes and everyday moisture, but the complete duffel should not be considered submersible or fully waterproof because water may still enter through seams and zippers.

Does the 35L X-PAC CORE Duffel have shoe storage?

Yes. The Medium CORE Duffel includes a dedicated shoe compartment to help keep training footwear separated from clothing and other gear inside the main compartment.

What can the 35L CORE Duffel hold?

The 35L capacity is designed for a full everyday training setup, including shoes, gym clothes, lifting accessories, a towel, toiletries and other essentials. It provides useful storage without stepping up to the size of a larger travel-focused duffel.

Is the X-PAC CORE Duffel only for the gym?

No. While it is designed around training, the 35L format also works well for sports, overnight trips, weekends away and everyday use. Its combination of organization, durability and water resistance makes it a versatile duffel beyond the gym.

Why choose X-PAC for a gym duffel?

X-PAC combines durability, structure and water resistance in a distinctive technical material. For athletes who want a gym duffel that can transition between training and travel, it provides a performance-focused alternative to traditional bag materials.