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3DL Sail Series Logo

3DL is the original 3D sailmaking technology. In 1992, North Sails introduced 3DL®, a revolutionary sailmaking technology that thermo-molds sails on full-sized, reconfigurable 3-dimensional molds. Today, 25 years later, 3DL North’s is still the only string sail constructed using 3D technology. Compared to a traditional sail assembled from panels of at sailcloth, a 3DL sail stretches less for its weight, holds its shape over a wider wind range and retains its designed shape longer than panel sails and 2D string sails. 3DL sails are composed of continuous structural yarns matching the anticipated loads in the sail, laid onto a 3D mold surface and encapsulated between outer layers of film or taffeta. 3DL thermo-formed laminates are vacuum bagged and heat cured to create a smooth and robust sail membrane.

With 25 years of proven performance, 3DL is the most winning sailmaking technology in history.


In 1992, North Sails introduced 3DL®, a revolutionary sailmaking technology that thermo-molds sails as a unitary membrane on a full-sized, reconfigurable 3-dimensional molds. Compared to a traditional sail assembled from panels of flat sailcloth, a 3DL sail stretches less for its weight, holds its shape over a wider wind range and retains its designed shape longer. 3DL sails are composed of continuous structural yarns matching the anticipated loads in the sail, laid onto a 3D mold surface and encapsulated between outer layers of film with taffeta. 3DL thermo formed laminates are vacuum bagged and heat cured to create a smooth and strong sail membrane.

Advanced Cruising Construction

  • 3DL MARATHON 600 features 100% high-modulus aramid yarn
  • 3DL MARATHON 860 features high-modulus aramid and carbon fiber yarns for enhanced shape retention
  • TF taffeta outer films available in white of gray color

3DL RACE uses our highly refined and evolved manufacturing process with our latest generation design shapes to provide affordable high end racing performance. The only 3D molded continuous fiber load path sail in the world which has won more races than any sail product ever before. 3Dl RACE is geared to small to mid- sized boats for Inshore, One Design, and Rating Rule racing.

Thermo-Formed Precision

  • 3DL 600 feature 100% high-modulus Black Aramid Yarns for specific classes and rule limitations
  • 3DL 860 features a blend of high-modulus black aramid yarn and North Flex-BalancedTM Carbon yarn for additional shape holding power
  • 3DL 800 features 100% Flex-BalancedTM Carbon yarn construction for lighter weight and even lower stretch
  • Single sided taffeta films in white or gray for improved toughness available