I was reading Ainslie's Laser Campaign Manual yesterday and noticed in an image of his downwind position he's wearing what looks like football spat socks over his boots. Anyone know why he would do this or what advantage it might be giving? I googled for a while to try to find mention of it. But the only thing I could think is the simple explanation of keeping the shoes as tight to his feet as possible. But the cotton/nylon sock seems like an odd choice around water.