This DGX Custom - Mares R2XR/SXS O2/Stage Reg Package is suitable for Oxygen Service without the need for additional preparation. The Mares SXS O2 Deco Regulator is an ultra-compact option for an accelerated decompression regulator. A quality piston R2XR DIN first stage together with the SXS balanced second stage featuring an ambidextrous breathing design that can be used on either the right or left side and includes a lateral side exhaust . The package includes a Mini-SPG in choice of PSI or BAR, S/S bolt snap with hose clip retainer, DIN cap, and comes assembled by Dive Gear Express with a green {40 in | 1 m} braided flex hose.

The lightweight, simple, compact R2XR first stage is a classic flow-by piston design by Mares for reliability. The R2XR has four standard size low pressure 3/8-inch ports and one standard size high pressure 7/16-inch port. One of the low-pressure ports now includes the Mares dynamic flow control (DFC) system to provide a constant inter-stage pressure during inhalation with gas flow unaffected by depth, tank pressure, or breathing rate. Tested with oxygen, the Mares R2XR now also includes their Auto Sealing Technology (AST) that stops contaminating agents from entering the interior of the first stage, a valuable safety feature for oxygen service applications! This version has the typical BSP G5/8 DIN connector that will fit 200 Bar and 300 Bar valves.

The Mares SRS Second Stage is a high-performance regulator with an exceptionally compact techopolymer body for ultra low weight. SXS stands for Second eXtra Small and emphasizes the extreme lightness and compactness of this second stage model. The SRS second stage features an ambidextrous breathing design that can be used on either the right or left side and includes a lateral side exhaust for better visibility in all diving positions along with an easy-to-use soft purge button. The Mares second stages also route part of the gas from the second stage valve directly to the mouthpiece through a curved bypass tube that creates a swirling effect or vortex movement. The core of the vortex is a low pressure area that pulls the diaphragm down during the inhalation phase, resulting in a markedly sensitive and easy breathing regulator. This Vortex Assisted Design (VAD) allows for the feel of natural breathing; you do not have the uncomfortable feeling of air being excessively “injected” into your mouth that is typical for high-performance venturi assisted second stages. The VAD also minimizes potential cold-water free-flow due to freezing because the gas expansion inside the 2nd stage occurs in the bypass tube, rather than on the mechanical parts.

Mares a version of the R2XR in Europe with green color plastic accents on the 1st stage bumper, however it also has an incompatible M26X2 fitting. Our US version has black color accents, but IS oxygen service and otherwise identical except that it has the standard BSP G5/8 DIN connector that will fit 200 Bar and 300 Bar valves. The US version of the R2XR is NOT compatible with the M26X2 Nitrox/Oxygen valve outlet mandated ONLY in the European Union by the EN 144-3:2003 standard.