Donut Bladder Twin Tank

Product No: 417512


The Donut Bladder Twin Tank is composed of two Bladder: an external one in ballistic nylon and a softer internal one for unloading faster.

Product Information


Mares has designed the Donut Buoyancy Bladder for Double Tanks to give technical divers the opportunity to use the mono SET harness they purchased previously. Any diver who has entered the XR world and decides to switch to the double tank, will only have to buy the bag. Its circular shape allows air to circulate easily and have the technical diver direct it towards the valves. According to your teaching guidelines, this bag offers you the option of placing the drain valve on the left or right.

The key features of the Donut Bladder Twin Tank are:
• Drains: 4 eyelets, 2 on the top and 2 on the lower outer part
• 1200D ballistic nylon in polyester and 600D for non-exposed parts
• Inner bag: black polyurethane
• High strength elastic zipper and slider with elongated teeth
• 4 high-strength eyelets resistance positioned to allow optimal adjustment
• New control group aka two speeds (standard and turbo) with brass buttons
• New oval corrugated tube, more elastic and low profile
• Positioning in the center does not interfere with the first stage
• Valve left/right modular low profile drain valve
• Extremely small drain knob
• Excellent hydrodynamics - great stability thanks to the "constant shape"


1200D nylon and 600D polyester exterior


Delivery & Returns


Online purchases on are enabled for Italy, France, Spain, Germany and Austria. Some products from the catalogue are only available to purchase at an authorised Mares Dealer.

Products shipped in Italy are entrusted to Bartolini couriers. Products shipped in France, Spain Germany and Austria are entrusted to DHL couriers.

Delivery times are 3-5 working days.



If you are not satisfied with your order, you can return it quickly and easily.

You can decide to return any products purchased on within 30 days of delivery. To return items, use the same box they were received in, complete the returns label found here with shipping details and attach it to the box. Remember to insert the delivery number found on page 1 of the delivery documents.


To allow you greater freedom, we have not chosen a courier service with which you need to return the package, you are free to choose your preferred service provider.

Please remember that shipping costs are your responsibility.


At the moment, we cannot offer exchanges on our products. If you would like a different size, please return the article for a refund and purchase a new size. If you still have any doubts, you can write us an email at, our Customer Service team will be happy to help.