Standard 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 MK2 for next-gen performance. Ideal for wrecks or cave dives, Halcyon wings ensure streamlined stability and fit, keeping you focused in challenging environments. ERGONOMIC. EFFICIENT. The Standard Double Cylinder System begins with your choice of Evolve or Legend MK2 wing, an aluminum backplate with MC Storage Pak, and a secure harness with crotch strap, packed in a Halcyon Traverse bag. Assembly is required, giving you the chance to build familiarity with your gear. Need more control or a custom fit? Upgrade to the Cinch™ Quick-Adjust Harness, add ACB weight pockets, or personalize your system with custom colors and embroidery. Standard Double Cylinder BC System Specifications Wing:Halcyon Evolve BC in 40 lb (18 kg) or 60 lb (27 kg) lift→ Upgrade option: Halcyon Legend MK2 – advanced routing and accessory control Backplate:Aluminum (standard, long, or small size)→ Upgrade option: stainless steel backplate for improved trim and ballast Harness:Secure Harness – fully adjustable→ Optional: Cinch™ Quick-Adjust Harness for tool-free fine tuning Included:MC storage pack, inflator with 52 cm / 22 in LP hose Optional Accessories: ACB10 weight pockets (4 kg / 10 lb), trim weight pockets, backplate padding Customization Full color and branding personalization available through the "Customize" Tool Note: Final assembly required. Additional fees apply for selected upgrades. Who is it For? Serious technical divers entering twin-set and overhead environments Explorers preparing for deep, long, or decompression dives Divers who want a modular, foundational system with room to grow Travel-ready technical divers needing lightweight components with upgrade options
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