Melbourne Surfboard Shop note: A smooth Zak mid-length for glide, paddle power and drawn-out turns. It is a strong option for surfers wanting more flow than a shortboard without moving to a full longboard. Zak Con Leche Mid-length. The Con Leche is all about glide and trim. Featuring a ultra smooth moderate rocker from nose to tail, coupled with beautifully tuned rail you can enjoy all the benefits of a larger board without feeling like your on a tank when you go to turn it. It has a fairly neutral bottom with a very subtle single concave through the middle of the board transitioning to a vee through the fins and off the tail. All of these come with a stronger than standard glass job.