Posebno vino ("special wine") is the official label applied to wines that do not qualify as vino strictu sensu, although they are prepared without artificial additives.
The most widely recognized examples are fortified wines to which alcohol is added at some stage of production either to arrest fermentation or to preserve specific flavours and bouquet. In Slovenia, a fortified wine quite similar to "wood" port is produced by the Vino Brežice winery in the Bizeljsko- Sremič area.
Sweet wines produced from dried grapes (similar to the Italian passito) are very popular and are produced in all viticultural regions. In accordance with local tradition, these may be labeled sušeno vino ("dried wine"), slamno vino ("straw wine" - indicating the process of drying harvested grapes on trays woven from straw), or pikulit (a somewhat misleading nomenclature arising from an association with a wine of similar taste made from Pikolit grapes). Some names of "dried" wines denote the day when the grapes are traditionally pressed, for example St. John's Wine.