Loop 15X

Product No: 416241


The 15X balanced membrane first stage has a DFC port and pre-oriented ports, making it suitable for octopus configuration. The Loop second stage has been designed and engineered in such a way that it allows the use of an under-the-shoulder hose. Maximum freedom of movement in all directions.

Product Information


15X First Stage

The 15X balanced membrane first stage has a DFC port and pre-oriented ports making it suitable for octopus configuration. Very compact and with a sandblasted finish.

The DIN300 balanced membrane first stage weighs 598g. In the INT version it weighs 772g.

Loop Second Stage

The Loop second stage has been designed and engineered in such a way that it allows the use of the hose with an under-the-shoulder configuration. This configuration enables it to be used with the hose coming from the left and minimises the risk of getting caught during a dive and hose vibration during movement.

The new vertical Loop second stage is designed with a 110 cm rubber hose, which is slightly longer than normal ones.

The new integrated S-VAD (Sagittal VAD) system, the special profile of the internal deflector combined with the double exhaust valve allow natural breathing at any depth, greatly increasing breathing comfort during the dive.

The large silicone purge button enables easy and immediate use, even when operated with thick gloves.

The new Loop is a compact and lightweight second stage and is also available as an Octopus in the classic yellow colour.


Ultralight Technopolymer
First stage:
Balanced Diaphragm
First stage weight INT:
First stage weight DIN:
Second stage weight:
Total weight (g) INT:
Total weight DIN:
High pressure ports:
2 HP 7/16" UNF
Low pressure ports:
4 LP 3/8" UNF
Hose type:
Rubber hose
Gas used:


  1. VAD - Vortex Assisted Design
    VAD - Vortex Assisted Design

    VAD - Vortex Assisted DesignThe air bypass tube delivers air to the mouthpiece creating a swirling vortex with a low pressure area in the center that keeps the diaphragm down during inhalation, for very sensitive and easy breathing at all depths.

  2. DFC - Dynamic Flow Control
    DFC - Dynamic Flow Control

    DFC - Dynamic Flow ControlMinimizes intermediate pressure drop during inhalation thus maximizing gas delivery, especially under extreme conditions.

  3. Ultralight Technopolymer
    Ultralight Technopolymer

    Ultralight TechnopolymerAbrasion resistant and affordable, ideal for diving in warm and moderate water temperatures.



Please follow the instructions contained in the manual. You must read and understand all warnings and instructions in their entirety before using our products. Scuba diving is a hazardous activity, which involves a risk of injury to any and all parts of the body. As with all scuba diving equipment, our products are designed to be used by trained, certified divers only.

Regulator Special Disclaimer
Equipment complying with EN 250 is not intended for breathing by more than one user at the same time.

If SCUBA equipment is configured and used by more than one diver at the same time, the cold water and breathing performance may not fulfill the requirements of EN 250. Therefore, the octopus should not be used during dives in cold water. Use of the dual regulator is recommended for cold water diving.

For safety reasons, it is not advisable to use an Octopus second stage that is not a certified Mares Octopus.

Delivery & Returns


Online purchases on mares.com are enabled for Italy, France, Spain, Germany, Austria, Netherlands, Luxemburg, Belgium and Finland. 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 other countries 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 mares.com 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.


You will receive the total refund on the same payment method you used to place your order, within 14 days after your return has reached our warehouse. 


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 shop@mares.com, our Customer Service team will be happy to help.