The Halcyon Evolve maintains a novel, industry first-design. This unique circular wing provides unprecedented control, allowing divers to easily fine tune their buoyancy, regardless of diving position. Individuals diving in all environments will appreciate the ease of adjustment and the streamlined, cylinder-hugging design of the Evolve. Two different lift capacities allow easy pairing with small doubles or large, heavy steel tanks. Whether swimming or scootering, the Evolve cuts through the water with less drag and greater efficiency, encouraging less effort and more diving enjoyment.Key Features of the Evolve System:Evolve Wing Available in 40-lb or 60-lb Lift Capacity (18-kg, or 27-kg)Choice of Aluminum or Stainless Steel Backplate in Standard or Small SizeComplete Secure Harness - infinitely adjustable and designed to fit you perfectlyStorage Pak - for convenient stowage of lift devicesAll Evolve wings are CE-certifiedEvolve Double System Includes:Evolve BC with Choice of Lift CapacityOEM Inflator & 22” LP HoseStainless Steel or Aluminum BackplateMC Storage PakOptional Cinch Upgrade Includes:Halcyon Cinch Quick-Adjust Harness Upgrade Cinch Adapter PlateACB Pocket AdaptersD-ring and Light Retainer AssembliesDoubles Bolt ExtenderStainless Steel Bolt Kit and FastenersQuick-Adjust Crotch Strap