I wear a long sleeve dryshirt and light nylon jogging pants. This keeps the sun off and is reasonably cool and comfortable, and a camelback for hydration. Even on a hot summer day here in FL, if there is a breeze and spray is flying, the long pants are great, and they help keep the skin on my knees to boot! As for footwear, I typically sail bearfoot, as I have yet to find a shoe I am comfortable sailing in that provides not only the grip, but the feel while on the wire. Maybe we can get some good shoe suggestions.