• excellent work of breathing, T-pieces virtually in the same place as OTS CLs
• Counterlungs are in front of the wing, as close to lung centroid as possible
• ports for high quality manual add valves with tactile differentiation between Oxygen and Diluent valves for low vis operation
•  port for plunger style ADV
• attached with Fastex releases for easy removal. Adjustable in the front and back for precise positioning
• two sets of Velcro loops on underside for precise routing over the shoulders
• built-in weight pocket
• dump valve at the bottom of exhale lung for flood recovery
• rock solid construction
  • Cover: Outer abrasion resistant shell made from Cordura 2000
  • Bladder : inner bladder made from RF welded CORDURA 560 with PU coating. It resists hydrolysis, low temperatures, and hydrocarbons.
• NO  OPV

This is an advanced experimental counterlung system. Do not use if you are not comfortable diving without OPV


ADV and MAVs are available. Uses standard HH MAVs and ADV. See below. 


Weight pockets and attachment points on the inside of the CLs 


Streamlined profile, clean chest


Easily reachable add valves




TOS CLs in action

Golem Top of the Shoulder Counterlungs from Curt Bowen on Vimeo.