z fins slalom slDelivery times: Unfortunately, all custom Fins items have extended delivery times due to production bottlenecks. We are in direct contact with the manufacturer and can therefore guarantee the fastest possible delivery. However, in some cases, delivery may take up to 1 4 months. Introducing the Slalom SL fin. SL is the best selling slalom model. Excellent performance, wide wind range. A stable and fast weapon for windsurfers of all levels.