Optiparts EX1064 This Optimist sail is half the size of a normal Optimist sail. Very easy to handle. Now even the smallest helmsman can continue sailing in heavy wind. Supplied 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 mast and boom with the addition of a 40 cm mast extender. The perfect way to get young or beginner sailors on the water in Optimists.