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Modular Reflex Training System for Boxing & MMA

The Kewlus Cobra Bag is the world's first modular cobra bag (reflex bag) designed with customisations, modifications, upgrades and add-ons in mind. This cobra bag is also DIY compatible so you can make your own components and add-ons, and save money.

It's not just a cobra bag - it's a dynamic and evolving modular reflex training system for boxing and MMA.

  • Cobra Bag Setup & Optimisation Instructions and Videos

    Get the most from your Kewlus Cobra Bag by setting it up correctly. 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 Speed of Your Cobra Bag

    Want insane speed? Check out these simple ways that you can increase the speed of your Kewlus Cobra Bag!

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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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  • 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 
  • Make a PVC Pipe Cobra Bag!

    The Kewlus PVC Pipe Cobra bag is a Semi-DIY cobra bag, which is extremely easy to make, but makes for one hell of a fast action cobra bag!

    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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  • Cobra Bag Training - Getting Started

    Cobra Bag Boxing Training - Getting Started

    Training with a cobra bag is a great way to get a full body workout, while practising defensive skills and sharpening your reflexes.

    Start Training 
  • Cobra Bag Training - Jabs

    Cobra Bag Boxing Training - 3 Round Power Jabs Session

    Work on your jabs with this 3 round session jab session. After a few sessions you'll see a major improvement in jab speed and accuracy.

    Start Training 
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New Stuff!

Max Speed Ball & V2 Adapter

This cobra bag ball is made for speed. It's made from a light, yet strong synthetic material. Get it as a combo with a V2 Adapter for mid-session switching.

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Cobra Bag Olympic Sleeve

Olympic Weight Plate Sleeve Coming Soon!

The Kewlus Olympic Weight Plate Sleeve will make it much easier to use Olympic weight plates to further enhance the rigidity of your Kewlus Cobra Bag or Spinning Bar.

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Cobra Bag Red Bar

Red Bar Coming Soon!

The Red Bar is designed to increase the cobra bag speed. It's a shorter and lighter version of the Click Bar that can be used in the top section of the cobra bag to make the bag move much faster.

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Air-Free Cobra Bag Ball Coming Soon!

Tired of having to pump up the cobra bag ball every few days to keep it nice and firm? Introducing the Air-Free Ball - a cobra bag ball that needs no pumping!

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Spar Bar Add-On Coming Soon!

The modular add-on to the cobra bag kit that many of you have been waiting for is coming soon: the Spar Bar Add-On.

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