Halcyon Custom Doubles System pressure checker Super-fine filaments

Super-fine filaments

designed to keep that awkwardly shaped gear off the ground and to let it drain

The HYDROS wing is designed to stay predominantly submerged even at the surface

The new silicone reduces fogging effect

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Halcyon Custom Doubles System pressure checker Super-fine filamentsStandard Doubles BC System Built for the depths. Ready for what's next. Halcyon helped shape technical diving from the start, beginning with twin cylinders. As pioneers of the backmount systems, we redefined twin set diving with the Evolve: the first circular dual bladder system, built for perfect balance and trim. The Standard Doubles Cylinder System features the Evolve wing in your chosen lift capacity, with an upgrade option to the advanced Legend