The AM-1 Mainsail is built in a full radial construction which distributes the load through the sail much more efficiently, this improves performance and longevity. New Features such as internal batten pockets and new patching has reduced the overall weight and made the sail even smoother than ever! The sail is manufactured from North Laminate Technora XI06. Please note sail measurement is not included - if you require measurement please arrange at the time of purchase, this will require an additional fee