I think that this is what caught your dad's attention:
"The Optisailors PRO Racer includes:
∑ Your choice of top-level Racing Spars – Although the Blackgold EX975 spar set is consider the best worldwide. We do off others, which sport their own unusual features. Giulietti Blacktop, light mast and the Optimax MK3 spar set. Guide to Spars."
There are 10 kinds of people. Those who understand binary and those who don't.