woven sailcloth / cruising / polyester
There are various types of sailcloth and sail material that can be used for your sails. Each type has a different purpose.
If you require an all out racing sail I would recommend a Pentex Laminate Sail Cloth, because it is lightweight, has exceptional stability and resistance to stretch but it does have a short and limited life expectancy.
Cruising Laminates are designed to provide a combination of the benefits of Laminates and woven materials. They resist stretch, to a point, and lighter fabric can be used. This means less weight aloft so providing less heel and pitch which equals better performance. However, when a Laminate sail has been stretched it stays stretched, which is far more apparent than on a woven sail