The Aqualung Mikron Octi is a fantastic lightweight Octopus.  This compliments the Aqualung Mikron Regulator set nicely.  

• Pneumatically Balanced 
• Pneumatically balanced for smooth, easy breathing
• Inhalation Adjustment 
• The inhalation adjustment knob allows you to desensitize the unit while stowed for the dive, preventing unwanted freeflow
• Yellow Purge Cover 
  • High-viz yellow purge cover and accent pieces
• Octo Hose 
  • 39in/99cm yellow hose for high visibility in case of emergency. Easily distinguishable from your primary hose