Hayabusa Unfilled Heavy Bag – Fillable Boxing & MMA Punching Bag

The Hayabusa Unfilled Heavy Bag ships empty — customise weight and density to your exact training needs.

• Ships unfilled: fill it yourself to customize the weight and firmness to match your preferred training style.
• Built for extreme use: an ultra-strong exterior withstands relentless punches, kicks, knees, and elbows through years of intense training.
• Ultra-strong engineered synthetic leather: the durable outer material feels comfortable and helps reduce abrasion during extended training.
• 5 ft (152 cm) length: a versatile full-length striking surface.
• Multiple disciplines: ideal for boxing, kickboxing, Muay Thai, and MMA training, as well as fitness training.
• Home or commercial gym: tested in countless gyms worldwide and made for intense use.

Frequently Asked Questions

Why would I buy an unfilled bag instead of a pre-filled one?

Unfilled bags are cheaper to ship because they weigh far less. The secondary benefit is customisation — you control exactly what goes inside and therefore control the weight, density, and feel.

What should I fill the bag with?

Start with a firm core of tightly packed rags or sand bags in the centre to add weight, then pack the outer layer with softer foam offcuts or fabric for surface cushioning. Most practitioners use a mixed approach for a firm but not punishing surface.

How heavy should I fill a 5-foot bag?

A 5-foot bag typically fills to 80–150lbs. For general training, aim for 100–120lbs, which provides enough resistance for power combinations without excessive swing.

What ceiling height do I need for a 5-foot unfilled bag?

A 5-foot bag requires a minimum ceiling height of approximately 9–10 feet for comfortable striking clearance at head level. Allow extra clearance for the chain and swivel hardware.