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World's First & Only!

The Kewlus Cobra Bag is the world's first & only modular freestanding reflex punching bag. No other bag has such a high level of component quality and reliability. No other bag offers you the ability to switch up your training, from speed to power, to long reach and beyond. Invest in the best!

Loved by Champions

Appreciated by boxing champions like Tim Tszyu, the McKenna brothers, the Moloney brothers, and embraced by the top boxing coaches around the globe, the Kewlus is revolutionising reflex training game and is fast becoming the go-to training tool for the top athletes worldwide.

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On National TV!

I had the incredible opportunity to present Kewlus on Shark Tank Australia. Honestly, I’m still pinching myself because never in my wildest dreams did I think I’d be demonstrating my product on national TV, especially on Shark Tank!

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Choose Your Kit:

Visit the Cobra Bag Kits page for help with choosing the kit that's best for you.

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Try & Buy Locally

Check with your local boxing gym for a demo and to buy without paying for shipping.

Sanctum Forge
  • Cobra Bag Customisation & Optimisation Instructions and Videos

    Get the most from your Kewlus Cobra Bag by setting it up with my tips. Included are details on increasing speed, height and improving performance.

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  • Make the Baseboard that's Right for You

    The most common and reliable base solution is to make a baseboard. I cover all the options here, from a basic light weight baseboard to a thick "Stubby" with a double-deck setup.

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  • Increase The Height of Your Cobra Bag

    Are you over 6 foot tall and need a taller cobra bag? Here are some simple ways you can increase the height of your Kewlus Cobra Bag!

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  • Advanced Cobra Bag Setup

    Get the maximum performance and add mobility to your KS3 Cobra Bag with this advanced base setup.

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  • Make a DIY Cobra Bag!

    Make your own fast and powerful cobra bag that is better than many of the commercial cobra bags at just the fraction of the cost!

    Full Instructions 
  • How To Make a $10 PVC Kewlus

    The original PVC and Pool Noodle Kewlus, which you can make from just $10!

    Full Instructions 
  • Make a Cobra Bag Baseboard!

    If you have ordered the Kewlus Cobra Bag kit that includes the Multi Base, the best way to set it up is to make a baseboard for it.

    Full Instructions 
  • Make a Boxing Spar Bar!

    Make this smooth-spinning spar bar for learning to slip punches and improve your defensive skills.

    Full Instructions 
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What's a Cobra Bag?

The cobra bag is a type of reflex punching bag that incorporates a football-sized ball on top of a rod or pole that is able to flex back and forth. The cobra bag is one of the best training tools for boxing training. It's ideal for developing a high level of hand-eye coordination and defensive boxing skills. The interactive nature of the cobra bag makes it fun to train with.

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New & Coming

The O

It's finally here! Sporting the powerful Prime (KS3) Spring, heavy duty Stainless Steel Mast and the beautifully crafted OctaBase, the O₃ is the ultimate Kewlus Reflex Training Machine designed and engineered for elite fighters and boxing gyms.

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Pure Speed Spring

Pure Speed Spring (KS3s)

It's the spring many of you have been asking for - Pure Speed (KS3s). This is a more powerful and faster spring that will be able to handle heavier loads with speed. Intended to be used as an alternative to the Prime (KS3), it sets the stage for training with heavier targets and a longer top section, all while maintaining incredible rebound speed.

Coming Soon

Long Shadow Spring (KS3L)

The Shadow was designed to emulate an opponent with a longer reach. I've added over 3 inches to the length/height without compromising speed or reliability. This spring is designed to sit lower down on the mast because most punches come from the legs, not just the upper body. Great for working on evasive movements and also an ideal upgrade for taller fighters.

Coming Soon