CORE PRO Duffel Small 25L
THE NEXT EVOLUTION OF OUR BEST-SELLING GYM DUFFEL
OUR BEST SELLERS, BUILT TOUGHER
Built for packing light, the CORE PRO Small Duffel is compact in size but loaded with hard-working features.
Purpose built for weightlifters. Carry your belt without sacrificing bag space. The dedicated external sleeve keeps it housed securely, while magnetic webbing straps snap into place to lock it down. The CORE PRO Duffel features a large velcro patch panel for personalization, drink bottle holder, secure quick-access pockets and our most heavy-duty shoulder strap to date.
KEY FEATURES:
- Compact 25L size: 25cm H x 40cm W x 25cm D / 9.8" H x 15.7" W x 7.8" D
- Fits up to size 10 shoes
- Designed to fit training essentials - accessories, wraps, straps, towel, water bottle and shoes
- Dedicated lifting belt sleeve
- 14" Laptop sleeve
- Velcro pannel for patch personalization
Add optional dividers and a lifting belt to build your setup your way.*
*Dividers and 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.
THE CORE DIFFERENCE
Your lifting belt has its own place.
The CORE PRO Duffel is built with a dedicated external lifting belt sleeve, so your belt stays secure, accessible and out of the main compartment.
Carry it hands-free
No more carrying your belt separately or forcing it inside your bag.
Save internal space
Keep more room inside for shoes, clothes, towels, bottles and daily gym gear.
Locked in place
Magnetic snaps secure the belt sleeve faster, cleaner and more securely.
CORE PRO — NEXT EVOLUTION
Upgraded where it counts
Same proven CORE function. Now upgraded with smarter belt storage and more ways to make it yours.
Magnetic Belt Sleeve
Upgraded from velcro to magnetic snaps for faster, cleaner and more secure belt storage.
Large Velcro Patch Panel
Built for added customization. Attach your favourite patches and make your CORE PRO setup your own.
Heavy-Duty Shoulder Strap
Our most heavy-duty shoulder strap to date, made with a stronger build, padded support and a more secure carry feel.
Custom Hardware & Reinforced Webbing
Finished with custom hardware and double-reinforced webbing in high-stress areas for a tougher, more dependable build.
SIZE COMPARISON
FAQS
What makes the CORE PRO Small Duffel different?
The CORE PRO Small Duffel is an upgraded version of our best-selling CORE gym bag. It keeps the same proven CORE function, now upgraded with magnetic belt sleeve closures, a larger velcro patch panel, our most heavy-duty shoulder strap, custom hardware and reinforced webbing.
What size is the CORE PRO Small Duffel?
The CORE PRO Small Duffel is a 25L gym duffel, measuring approximately 40cm wide x 25cm high x 25cm deep. It weighs 1.4kg / 3.1 lbs and is designed for daily gym sessions, lifting gear, shoes and everyday essentials.
Does the CORE PRO Small Duffel fit a lifting belt?
Yes. The CORE PRO Small Duffel has a dedicated external lifting belt sleeve designed to fit belts up to approximately 4.5" wide x 45" long. The belt sits outside the main compartment, helping save internal packing space for the rest of your gear.
Will it fit other lifting belt brands?
The Small belt sleeve is designed to fit lifting belts up to approximately 4.5" wide x 45" long. Other lifting belt brands may vary in thickness, stiffness and shape, so fit can depend on the specific belt.
Does the Small Duffel have shoe storage?
Yes. The CORE PRO Small Duffel has shoe storage designed to fit up to a US men's size 10 shoe. Shoe fit can vary depending on the shoe style, bulk and shape.
Does the CORE PRO Small Duffel fit a laptop?
Yes. The CORE PRO Small Duffel includes a laptop sleeve that fits up to a 14" laptop, making it a practical option for gym-to-work carry or everyday use.
What should I pack in the CORE PRO Small Duffel?
The Small is ideal for daily gym essentials like shoes, training clothes, wraps, straps, bottles, towels, accessories, a 14" laptop and a lifting belt stored externally. It gives you more room than the Mini without moving into a larger full-size duffel.
Should I choose the Mini or Small CORE PRO Duffel?
Choose the Mini if you want the most compact option for light gym essentials and a KNKG Lifting Belt. Choose the Small if you need more packing space, shoe storage up to size 10, a 14" laptop sleeve and a larger lifting belt sleeve.
Can I add patches to the CORE PRO Small Duffel?
Yes. The CORE PRO Small Duffel includes a large velcro patch panel so you can customize your setup with compatible patches.
Is the lifting belt included?
No. The lifting belt is sold separately. The CORE PRO Small Duffel includes the dedicated belt sleeve, but the belt itself is not included.
- DPDaniel P.Verified BuyerReviewingCORE Duffel Medium 35LI recommend this productWhat type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, CrossFit, Olympic LiftingUsing For: Gym Bag, Sport / Fitness, Every Day Carry, WorkRated 5 out of 5 starsAwesome Gym Bag!
Wish I found this sooner. Shoulder strap is comfortable, the material feels durable, variety of pouches/zip pockets for organization of smaller items. And the perfect space for all the gym essentials.
Also the zippers open effortlessly, it’s a nice touch.
- RLRobin L.Verified BuyerReviewingCORE Duffel Mini 15LI recommend this productWhat type of training is your KNKG bag supporting you with? Weightlifting, Fight & Combat SportsUsing For: Gym BagRated 5 out of 5 starsLove it!
I use this bag to carry essentials to the gym and to Taekwondo classes. It's big enough to carry everything I need but still fits in a gym locker. Construction seems sturdy.
- KWKelly W.Verified BuyerReviewingCORE Duffel Mini 15LI recommend this productWhat type of training is your KNKG bag supporting you with? WeightliftingUsing For: Gym BagRated 5 out of 5 starsI love this mini!
I didn’t need the larger duffle and chose the mini and it did not disappoint.
Customer service was 10/10 and they sent me measurements to determine if my lever belt would fit and it did.
Great bag, great company.
- JJeremyReviewingCORE Duffel Waxed Canvas Medium 35LI recommend this productRated 4 out of 5 stars4 Stars
Quality of material feels amazing. Design is awesome. Only issue is the snaps for the handles comes undone with no effort. I don’t really use that feature much but it is annoying and if it was a prime feature for me it would be disappointing. Im eyeing the backpack as a daily use bag, maybe next year. Great bag.
- WWWeston W.Verified BuyerReviewingCORE Duffel Mini 15LI recommend this productWhat type of training is your KNKG bag supporting you with? Weightlifting, Functional Circuit Training, Olympic Lifting, Bodybuilding, Fight & Combat SportsUsing For: Gym BagRated 5 out of 5 starsPerfect Gym Bag
Perfect size, great quality, and keeps things simple
CORE PRO Duffel — Small 25L Gym Bag with External Lifting Belt Storage
The KNKG CORE PRO Small is a heavy-duty 25L gym duffel with external lifting belt storage, built for weightlifters, powerlifters and everyday strength training.
Keep your lifting belt secured outside the bag while the organised interior carries your shoes, clothes, training accessories, bottles, valuables and laptop.
A Small Gym Duffel Designed to Carry a Lifting Belt
Weightlifting belts are bulky and can take up valuable space inside a standard gym bag. Packing your belt in the main compartment leaves less room for shoes, clothes, sleeves, wraps and other training equipment.
The CORE PRO Small solves this problem with a dedicated external weightlifting belt sleeve. Your belt stays secured to the outside of the duffel, where it remains easy to access without taking over the 25L main compartment.
- Save Internal Space: Carry your lifting belt externally and leave more room inside for the rest of your gym gear.
- Secure Belt Storage: Magnetic snaps help hold the lifting belt sleeve firmly closed while you are on the move.
- Quick Access: Remove your belt without unpacking your shoes, clothes or training accessories.
- Hands-Free Carry: Keep your lifting belt attached to your gym bag instead of carrying it separately.
Compact 25L Capacity for Everyday Training
The CORE PRO Small provides more packing space than the Mini while remaining compact and easy to carry. Its 25L capacity is designed for everyday gym sessions, giving you room for shoes, clothing and lifting accessories without the bulk of a large travel bag.
It is ideal for lifters who want a versatile small gym duffel bag that fits comfortably inside gym lockers, cars and everyday storage spaces.
Built for Weightlifting, Powerlifting and Strength Training
The CORE PRO Small is not a generic sports bag with gym branding added to it. It is a purpose-built weightlifting gym bag designed around the equipment used during powerlifting, bodybuilding, strength training and functional fitness sessions.
Use it for daily workouts, commercial gyms, powerlifting clubs, bodybuilding sessions, strength and conditioning training, weightlifting competitions or gym-to-work carry.
What Fits Inside the Small 25L CORE PRO Duffel?
The 25L interior provides room for a practical everyday gym setup while your lifting belt remains stored externally. Depending on the size and shape of your equipment, the CORE PRO Small can carry:
- Weightlifting shoes, training shoes or sneakers
- A change of gym clothes
- Knee sleeves or elbow sleeves
- Wrist wraps, lifting straps and grips
- Chalk, tape and smaller lifting accessories
- A gym towel
- A shaker bottle or water bottle
- Headphones and training electronics
- Snacks or post-workout supplements
- Phone, wallet, keys and other valuables
- A laptop up to 14 inches
Carrying your lifting belt on the outside leaves more of the bag’s internal capacity available for the gear you need before, during and after training.
Dedicated Shoe Storage
The CORE PRO Small includes dedicated shoe storage designed to fit footwear up to approximately a US men’s size 10. Shoe fit may vary depending on the style, shape and bulk of the footwear.
Separating your shoes from the main packing area helps keep footwear organised and away from clean clothes, electronics and smaller training accessories.
Laptop Storage up to 14 Inches
A dedicated laptop sleeve fits devices up to approximately 14 inches, making the CORE PRO Small practical for carrying your training gear between home, work and the gym.
The combination of gym-focused storage and laptop protection makes it a versatile option for lifters who do not want to carry separate work and training bags.
Magnetic External Lifting Belt Sleeve
The upgraded belt sleeve uses magnetic snaps for faster, cleaner and more secure lifting belt storage. The magnetic closure helps lock the sleeve in place while keeping your belt easy to remove when it is time to train.
The Small CORE PRO Duffel is designed to carry lifting belts up to approximately 4.5 inches wide and 45 inches long. Belt compatibility may vary depending on its thickness, shape and construction.
Upgraded Heavy-Duty Shoulder Strap
Shoes, lifting equipment, bottles and clothing can quickly make a gym bag heavy. The CORE PRO Small features KNKG’s upgraded heavy-duty shoulder strap with a stronger build, padded support and a more secure carry feel.
Reinforced handles and webbing provide additional carrying options when moving between home, work, the gym and training events.
More Ways to Personalise Your Gym Bag
A larger hook-and-loop panel gives you more space to personalise the CORE PRO Small Duffel with patches. Add your name, gym, country flag, training club, competition patches or KNKG accessories to make the bag your own.
The expanded patch area also makes it easier to identify your duffel in a busy gym, locker room or competition environment.
Heavy-Duty Materials and Construction
- Durable 500D nylon body material with PVC backing
- Ripstop nylon internal lining
- Heavy-duty YKK zippers
- Magnetic snap closure on the lifting belt sleeve
- Powder-coated steel buckles and hardware
- Reinforced nylon webbing straps and handles
- Double-reinforced webbing in high-stress areas
- Abrasion-resistant construction for demanding daily use
Smarter Organisation in a Small Gym Bag
The CORE PRO Small combines a compact main compartment with dedicated storage for footwear, a laptop, bottles, valuables and smaller training accessories.
Instead of relying on one large unstructured compartment, the bag helps separate frequently used items and makes it easier to find your equipment without emptying the entire duffel onto the gym floor.
Who Is the Small 25L CORE PRO Duffel For?
The CORE PRO Small is best suited to lifters who want dedicated lifting belt and shoe storage in a compact everyday gym bag. It offers more room and organisation than the Mini without the additional bulk of the Medium or Large Duffel.
Choose the Small 25L size if you normally carry one pair of shoes, a change of clothes, lifting accessories, bottles and a laptop up to 14 inches. Choose a larger CORE PRO Duffel if you regularly carry more clothing, larger footwear, multiple pairs of shoes or additional training equipment.
Why Choose the Small KNKG CORE PRO Duffel?
- External lifting belt holder designed for weightlifters
- Compact 25L capacity for everyday training
- Magnetic belt sleeve for faster and more secure storage
- Lifting belt compatibility up to approximately 4.5 inches wide and 45 inches long
- Dedicated shoe storage for footwear up to approximately a US men’s size 10
- Laptop sleeve for devices up to approximately 14 inches
- Upgraded heavy-duty padded shoulder strap
- Expanded hook-and-loop panel for gym patches
- Heavy-duty YKK zippers and powder-coated steel hardware
- Reinforced webbing and abrasion-resistant materials
- Purpose-built for strength training rather than generic everyday carry
Frequently Asked Questions
What is the best small gym bag for carrying a lifting belt?
A small gym duffel with dedicated external belt storage allows you to carry a bulky weightlifting belt without sacrificing valuable space inside. The CORE PRO Small includes an external lifting belt sleeve designed to keep your belt secure, accessible and separate from the rest of your equipment.
Does the Small CORE PRO Duffel have a lifting belt holder?
Yes. The Small CORE PRO Duffel includes a dedicated external lifting belt sleeve with magnetic snap closures. This allows your belt to remain secured outside the 25L main compartment.
What size lifting belt fits the Small CORE PRO Duffel?
The external belt sleeve is designed to fit lifting belts up to approximately 4.5 inches wide and 45 inches long. Fit may vary depending on the belt’s thickness, shape and construction.
Is a 25L duffel big enough for the gym?
A 25L gym duffel is suitable for most everyday training sessions. The CORE PRO Small can carry shoes, clothing, sleeves, wraps, lifting accessories, bottles, valuables and a laptop while your lifting belt remains stored externally.
Does the Small CORE PRO Duffel have shoe storage?
Yes. The Small CORE PRO Duffel includes dedicated shoe storage designed to fit footwear up to approximately a US men’s size 10. Fit can vary depending on the style and bulk of the shoes.
Can the Small CORE PRO Duffel carry a laptop?
Yes. The Small CORE PRO Duffel includes a laptop sleeve designed to fit devices up to approximately 14 inches.
Is the Small CORE PRO Duffel suitable for powerlifting?
Yes. Its external lifting belt holder, shoe storage and organised 25L capacity make it well suited to carrying common powerlifting equipment such as lifting shoes, knee sleeves, wrist wraps, straps, chalk and training clothes.
What is the difference between the Mini and Small CORE PRO Duffels?
The Mini has a compact 15L capacity and does not include recommended shoe storage. The Small increases capacity to 25L and includes dedicated shoe storage, a laptop sleeve for devices up to 14 inches and additional room for everyday gym gear.
What is the difference between the Small and Medium CORE PRO Duffels?
The Small CORE PRO has a compact 25L capacity and is designed for streamlined everyday training. The Medium provides 35L of space, accommodates a larger laptop and offers more room for clothing, accessories and additional equipment.
What is the difference between the CORE and CORE PRO Duffel?
The CORE PRO builds on the original CORE Duffel with magnetic external belt storage, an upgraded heavy-duty shoulder strap, improved custom hardware, reinforced webbing and a larger hook-and-loop panel for greater patch personalisation.
Can the Small CORE PRO Duffel be used as a work and gym bag?
Yes. Its compact 25L size, shoe storage and laptop sleeve make it suitable for carrying everyday work and gym essentials in one organised bag.