The Mares Donut Bladder Single Tank is a jacket-style BCD from Mares – the most popular format for recreational divers in Malaysia. It wraps around you comfortably, distributes lift evenly, and gives you stable, neutral buoyancy on every dive from Redang’s shallow reef flats to the shallows.
Technical Specifications
| Specification | Details |
| Brand | Mares |
| Product | Donut Bladder Single Tank |
| Type | Jacket BCD |
| Material | Cordura / Nylon |
| Lift Capacity | ~20 kg |
| Pockets | Multiple D-rings & cargo pockets |
| Weight Pocket | Integrated release |
| Best For | Recreational / Technical diving |
Key Features
- Jacket-style design: Wraps around you for a stable, comfortable fit – the most natural feel underwater.
- Integrated weight pockets: Quick-release weight system for safety and convenience.
- Multiple D-rings: Attach all your gear securely without clutter.
- Durable Cordura construction: Built to handle years of salt-water diving.
Suited for Malaysian Dive Sites
The Mares Donut Bladder Single Tank is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Redang’s shallow reef flats, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse thoroughly after every dive – salt and sand clog the inflation bladder.
- Inflate the bladder and let it dry fully before storing – prevents mildew.
- Lubricate the dump valve with silicone spray every few dives.
- Have it serviced professionally once a year.
Final Verdict
The jacket BCD is the workhorse of recreational diving, and the Mares Donut Bladder Single Tank is a solid, reliable example. Comfortable buoyancy, good organisation, and a fit that works for most divers.




Jaden Goh –
What is the optimal tank pressure setting for the Mares Donut Bladder Single Tank to achieve maximum performance?
Imran Hanafiah –
Thank you for your review, Jaden! The optimal tank pressure setting for the Mares Donut Bladder Single Tank may vary depending on your specific diving needs and conditions. However, we recommend following the manufacturer’s guidelines, which are typically found in the user manual or on their official website. As a general rule, a pressure setting between 125-150 bars is often considered optimal for this product. However, we always advise our customers to consult with a diving professional or conduct their own tests to find the perfect pressure setting for their needs.
Landon Wong –
Can a single tank be as reliable as multiple tanks in maintaining the perfect trim?
Junhao Lo –
Thank you for your question, Landon. The Mares Donut Bladder Single Tank is designed to provide perfect buoyancy and trim, just like a setup with multiple tanks. The Donut Bladder is a unique design that keeps the tank in a neutral position, eliminating the need for complex tank positioning systems. Many divers find that a single tank configuration using the Donut Bladder is just as reliable as multiple tanks in maintaining trim.
Landon Wong –
What type of material is the Mares Donut Bladder Single Tank made of, and will it withstand high water pressures?
Junhao Lo –
Thank you for your review, Landon! The Mares Donut Bladder Single Tank is made of a durable, high-quality material that is designed to withstand high water pressures. It’s built with a robust polyurethane bladder and a stainless steel wire, providing a secure and reliable connection. Furthermore, the tank has been tested to meet stringent international diving standards, ensuring it can handle the pressure of deep dives while maintaining its buoyancy and trim. If you have any further questions or concerns, please don’t hesitate to reach out. We’re always here to help. We’d also love to hear more about your diving experience with the Mares Donut Bladder Single Tank! Have you used it in any particularly challenging conditions?
May Lim –
I am impressed with the Mares Donut Bladder Single Tank’s balance and stability, but sometimes the bladder can shift slightly to the left, which affects the trim. Overall, I’m satisfied with its performance.
Natalie Lim –
What makes the Mares Donut Bladder Single Tank’s donut-shaped design so effective at maintaining buoyancy?
Junhao Lo –
Thank you for your question, Natalie! The donut-shaped design of the Mares Donut Bladder Single Tank provides stability and efficiency due to its unique form. The curved shape of the tank reduces pressure on the ribcage and diaphragm, allowing for better airflow and minimizing the effort required to breathe. This, in turn, maintains perfect buoyancy and trim, making it easier for divers to stay comfortable during dives.
Natalie Lim –
I’ve been using the Mares Donut Bladder Single Tank for two months now, and it’s exceeded my expectations.