Elvstrøm Sails pioneered the huge development of mainsails that perform well with In-Mast furling systems.
These sails, whether they are made in woven polyester, DC laminates or EPEX add a level of performance almost equal to that from a conventional mainsail.
We achieve this by using long vertical battens with a round profile, which allows the battens to be rolled into the mast without being distorted or twisted. This also keeps the bulk of the battens in the mast as small as possible, but with the maximum stiffness. The upper (leech) part of these battens is constructed in carbon for extra stiffness.
The round profile of the battens also allows the sail to roll in and out without any hard edges to catch on the entry to the mast chamber.
The battens are jointed to make at easy as possible to get the battens into the sails, and to be stored when the boat is ashore. The bottom end of the batten has an in-built adjuster, as well as an adjuster on the batten pocket. The joints and adjuster are in marine grade stainless steel, to a design unique to Elvstrøm Sails.