The 3Di technology, in which the load-bearing fibers are glued together directly without foil or film, was originally intended for regatta yachts and has proven itself there. After North managed to process polyester in addition to carbon and aramid fibers for a good three years, the technology became interesting for cruising yachts and was henceforth offered under the nickname Ocean. According to North, the laminated sails should be much more dimensionally stable than woven cloth, but similarly robust due to the lack of a break-sensitive film, which would avoid the main problem of dacron sails.
A comfortable ride from the 3Di Ocean 370. The checked pattern is striking, it is created by additional fiber layers
So far, however, the Americans have only been able to process pure polyester fibers or polyester-aramid mixtures, with which smaller boats and very large yachts over 60 feet could be equipped. In the Ocean 370 variant, which has now been presented, a combination of polyester and high-strength polyethylene, similar to the well-known Dyneema, is used - with which very durable sails can be produced for yachts from 35 to 60 feet in length. The sails are available both in pure white and tinted gray.
Further information at Northsails