An evolution of the Castoro 2 model, with improvements to some important technical features and aesthetically restyled. It comes in the men's and women's versions. The long-sleeved jumpsuit is made from 5 mm neoprene, with a strong YKK rear zipper. The zipper comes with the Aquastop system under-zip.

The Aquastop system consists of a smooth 1.55 mm neoprene seal, coated in Metallite. This system has also been adapted to the wrist and ankle areas for additional warmth. The shoulder and knee areas are protected from wear and tear by large inserts made from Power Tex. The legs are anatomically preformed to increase fining ease and give a more natural feeling.