Laminated sails also offer greatly reduced weight over dacron sails, which translates into reduced weight aloft. Racing sails offer the greatest weight savings, but also last the shortest amount of time. These are the sails that seem see through from a distance because they are purely milar and fibers. The fibers are what give these sails their colors.
Black fibers are from Carbon and Technora
Gold fibers are from Aramid
Tan fibers are from Vectran
White fibers are from Polyester
These see through racing sails will last between 2 to 3 years before the delaminate.
Cruising versions of laminated sails last longer by providing the sails with a Taffeta coating. This will extend the life of the sail to 5 to 7 years. Taffeta can be applied on one side for some protection or both sides for maximum protection. Taffeta gives the sail a white look, with the fibers shinning through. From a distance, these look like regular sails until you notice the fiber bands running through the sail.
The reason taffeta helps protect the laminated sails is because it is made of dacron! This coating helps protect the sail from chafe and wear, but it does add considerable weight to the sail. If you decide to go with a laminated sail, I strongly recommend the taffeta coating, it only costs a little extra but it greatly increases the longevity of the sail.
If you are planning a long offshore voyage with laminate sails, I would strongly urge you to carry a spare set of sails in the event that one of the sails dies while offshore.
The choice ultimately comes down to what suits your needs best? If you are racing, then a stripped down laminated sail is right up your alley. If you are doing coastal cruising or short offshore jaunts, laminated sails with taffeta coating will provide a wonderful service life for you. If you plan on sailing far offshore, bullet proof dacron sails might be your best choice. They won't hold their shape forever, but you will always have a sail to get you home!