Optiparts Optimist Trisail with Mini Boom, Sleeve Mast and Mast ExtenderEX1064Half the size of a normal Optimist sail. Very easy to handle. Now even the smallest helmsman can continue sailing in heavy wind. Comes as a set with a sleeve mast, long mast extender and mini boom with boom bumper head protector. The TRISAIL can also be used with a regular sleeve and mast boom with the addition of a 40cm mast extender.