Luff 402, boom 167cm. Rigs on a 400 mast. In good condition. S-1 is a wave sail that I've mostly used for foiling. It's definitely my favourite foiling sail. It feels light in the hands, so it also works well for teaching friends to sail on a big board too.
I've always used it with a RDM.
I'm not sure exactly what year this sail is, but at a guess ~2013.
Only selling as I've bought a 2020 S-1 to replace it.
Prefer local pick up, but could post at buyer's expense.