Sail making Elvström Sobstad knew to preserve a great know-how to make the sails of old man gréements (traditional or tradition), by taking care of its files and growing rich through collaborators resulting from old sail makings, which them also preserved all the know-how and the turns of essential hands, so that on the basis of modern rovings, although tinted or white according to the times, we succeed in making sails whose aspect resembles as much as possible the sails of time of these boats.