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PB-ONYX-4FT-EMP-WHI

Onyx 4ft Premium Boxing Bag [White]

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Onyx 4ft Premium Boxing Bag [White]

Premium Combat Gear. Built for Power, Designed to Endure.

The Onyx 4ft Premium Boxing Bag is engineered for serious training environments - commercial gyms, boxing clubs, martial arts studios and home setups that demand the highest standard.

Constructed with rugged T-Flex leather, this bag delivers endurance, impact resilience and a premium feel. Available empty or filled, in a clean white finish with Onyx black branding.


Key Features

  • Heavy-duty T-Flex leather outer - commercial-grade durability with superior tear and abrasion resistance for relentless striking
  • Full 4ft size (120cm x 40cm) - suits punches and mid-level kicks, ideal for boxing and MMA training in standard-ceiling spaces
  • Empty or filled - customise your own fill or choose the ready-to-hang filled version (approx. 55-60kg)
  • Reinforced nylon strap mounting - heavy-duty straps included for ceiling or beam suspension
  • Sleek Onyx branding - high-end aesthetics to match elite facilities

What is T-Flex Leather?

T-Flex is a premium high-performance synthetic leather used on commercial combat equipment. It mimics the look and feel of genuine leather with added durability - impact-tested to withstand up to 300,000 strikes. It's also UV-resistant, water-resistant, and nano-antibacterial, helping minimise moisture build-up and keep gear hygienic through sweaty sessions, while internal foam layers keep the striking surface consistent and comfortable over time.


Specification Details
Model Onyx 4ft Premium Boxing Bag
Dimensions (L x W) 120cm x 40cm
Material T-Flex leather (commercial grade)
Fill Options Empty / Filled
Weight (Filled) Approx. 55-60kg (heavier fill available on request)
Mounting Reinforced heavy-duty nylon straps (included)
Finish White outer, Onyx black logo
Use Case Commercial gyms, boxing clubs, MMA studios, home gyms
Warranty 12 month commercial warranty

Frequently Asked Questions (FAQs)

Q: Can I hang the bag from a ceiling mount?
A: Yes - reinforced heavy-duty nylon straps are included for ceiling or beam suspension. Ensure your mounting point is rated for dynamic loads, or use our single or double floor-mounted bag stands.

Q: What's the difference between empty and filled?
A: The empty version ships lighter and lets you customise the fill - grab our Australian-sourced Punch Bag Fill Material (a 4ft takes around 40kg of rag) for a softer bag, or add a sand/fabric mix packed denser at the base for more resistance. The filled version arrives pre-packed at approx. 55-60kg, ready to hang. Want it heavier? We can fill heavier on request - contact us before ordering.

Q: Which size should I choose - 4ft, 5ft or 6ft?
A: The 4ft is the boxing and home-gym favourite - full punching range with easy clearance under standard ceilings. Kickboxers wanting more leg-kick target should look at the 5ft, while Muay Thai and full-range strikers should go the 6ft.

Q: Does it come in other colours?
A: Yes - this bag is also available in black.

Q: Is it suitable for kicks and knees?
A: Yes - the T-Flex exterior handles impact from all angles. At 4ft, hang height determines how much low-kick target you have; for dedicated kick work consider the longer sizes.


Shop More: Boxing Bags

Complete Your Setup: Punch Bag Fill Material | Boxing Paddles
Browse Full Range: Boxing Equipment

Built to take every shot you've got - train harder with Onyx.

Onyx 4ft Premium Boxing Bag - engineered for commercial gyms, boxing clubs, and martial arts studios

Fitness Hero Sydney

Customer Reviews

Based on 1 review
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Simon B (Melbourne, AU)
White ONYX punching bag

In general, I’m happy with the bag. Before purchasing, I left an enquiry about what T-flex leather is and whether it’s synthetic or genuine leather, but received no response. I also asked if there was an actual photo of the product rather than just a digital image, but again, no answer. I decided to go ahead with the purchase anyway.

For anyone wondering, T-flex leather is definitely synthetic. I’m not sure why it’s marketed as “leather,” and the website provides no further description. It would have been better if this information had been available upfront.

When I measured the bag’s height, it came to about 1.05 m—that’s the height of the side panel, excluding the top and bottom panels. I bought 40 kg of fill material, but as shown, it only compacted up to the letter N. I’ll need at least another 5–10 kg of material.

That said, I’m happy with the look and build quality. I can’t yet comment on durability, but so far, so good. I’ve attached a photo to help others with their decision-making.

Thank you for your feedback.

T-Flex leather is a high-performance synthetic leather made for combat sports gear. It’s engineered to feel like genuine leather while offering long-lasting durability, with impact-tested resistance up to 300,000 strikes. T-Flex is UV-resistant, water-resistant, and nano-antibacterial, helping reduce wear, fading, and moisture build-up during training.

We have provided further information on the products to ensure customer are more aware. In terms of the filling, this can depend on the type of filling used. For example, using thick heavy filling will require less than using premium nylon etc. We try to estimate based on how we fill them, however this can differ if customers fill the bags themselves

Again, we appreciate your feedback and will take this into account to improve