CORE Backpack Medium 25L
PACKING A WEIGHTLIFTING BELT? THIS IS THE BACKPACK FOR YOU
- External weightlifting belt attachment
- 16” Internal laptop sleeve
- Sealed internal shoe compartment
- Dual bottle pockets
Do you even lift? If so, meet your new training partner. Say goodbye to your belt wasting space inside your bag, with this unique and specially designed lifting belt attachment that ensures bag functionality isn’t compromised whatsoever. The CORE Backpack is made for those who train hard and pack smart.
(Lifting belt sold separately)
SIZE COMPARISON
This backpack is designed for serious lifters who crave serious organization.
This gym bag works harder than you do. This is the best and most functional gym bag you can find.
This is the best gym bag for powerlifters. Many amazing features that set this bag apart from its rivals. The outer material is tough, durable, and lightweight while also being water resistant and easy to clean.
FAQS
- BFBrandon F.Verified BuyerReviewingCORE Backpack Waxed Canvas Medium 25LI recommend this productWhat type of training is your KNKG bag supporting you with? Weightlifting, Bodybuilding, OtherUsing For: Gym Bag, Sport / FitnessRated 4 out of 5 stars4.5 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…
- JGJose G.Verified BuyerReviewingCORE Backpack Medium 25LI recommend this productWhat type of training is your KNKG bag supporting you with? WeightliftingUsing For: Gym BagRated 5 out of 5 starsPerfect 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.
- ACAustin C.Verified BuyerReviewingCORE Backpack Medium 25LI recommend this productWhat type of training is your KNKG bag supporting you with? Functional Circuit Training, CrossFitUsing For: Work, Every Day Carry, Sport / Fitness, Gym BagRated 5 out of 5 starsDurability 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.
- JSJasper S.Verified BuyerReviewingCORE Backpack Mini 13LI recommend this productWhat type of training is your KNKG bag supporting you with? Weightlifting, Olympic LiftingUsing For: Gym BagRated 5 out of 5 starsAwesome 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!
- RLRobert L.Verified BuyerReviewingCORE Backpack Medium 25LI recommend this productWhat type of training is your KNKG bag supporting you with? WeightliftingUsing For: Gym BagRated 5 out of 5 starsGreat bag even better customer service
Great bag even better customer service
Ultimate Gym Backpack with Weightlifting Belt Attachment — KNKG CORE Backpack
The CORE Backpack is purpose-built for lifters who want the convenience of a backpack with the functionality of the iconic weightlifting belt attachment. Designed for the gym, not the office, this pack carries everything you need for serious training sessions — and keeps your lifting belt secure on the outside so the inside stays free for the rest of your gear.
Why the Weightlifting Belt Attachment Matters
Lifting belts are bulky, and most backpacks aren’t built to carry them. Forcing one inside means less room for your gear. The CORE Backpack solves this with an external weightlifting belt sleeve that gives gym rats the freedom to pack properly:
- Save Space: Belt stays outside, leaving the main compartment free.
- Secure Fit: Reinforced sleeve and straps keep your belt secure while you move.
- Quick Access: Pull out your belt instantly when it’s time to lift.
- Backpack Convenience: Carry comfortably whith padded shoulder straps and a breathable back pannel.
What Fits Inside
The CORE Backpack is designed for the gym. Here’s what you can fit inside:
- Weightlifting shoes or sneakers (dedicated shoe compartment)
- Change of training clothes
- Shaker bottle or water bottle (side pockets)
- Chalk, straps, wraps, and grips
- Knee sleeves or elbow sleeves
- Towel
- Headphones, small tech, or training electronics
- Snacks or post-workout supplements
- Phone, wallet, and keys (internal valuables pocket)
With your belt carried externally, the backpack’s interior compartments are left open for everything else you need for heavy training.
Materials & Build
- 500D nylon body material with PVC backing
- Ripstop nylon lining
- Heavy-duty YKK zippers
- Reinforced nylon webbing straps and handles
The Toughest Gym Bag Quality
Like the CORE Duffel, the CORE Backpack is built to thrive under tough conditions. Reinforced stitching, abrasion-resistant nylon, and metal hardware mean it’s made to last through years of training sessions, travel, and gym-floor abuse.
Why Choose the CORE Backpack?
- Unique external weightlifting belt attachment
- Purpose-built for weightlifters — not your average everyday carry backpack
- Smart compartments: shoe zone, valuables pocket, side bottle holders
- Built from premium, abrasion-resistant materials for unmatched toughness