Venne inventata nel 1969 da Mike Humphrey e Mike Borrow, soci del marchio inglese Underwater Marine Engineering, assistiti da Joseph Salim Peress, progettista della ADS "Tritonia". ###>It was invented in 1969 by Mike Humphrey and Mike Borrow*, partners in the English firm Underwater Marine Equipment Ltd (UMEL), assisted by Joseph Salim Peress, whose Tritonia diving suit acted as their main inspiration.