Rare means aged for a minimum of 20 years, resulting in very concentrated and sweet wines due to evaporation in the warm cellar conditions. This slow, controlled oxidative process increases the concentration, sweetness and imparts delicious nutty, chocolate, treacle and rancio flavours. My secondRare Rutherglen fortified wine in one dayI am reeling from the experience. This opportunity rarely comes along.. excuse the pun, and one not to be missed. Heaven in a bottle and a heavenly experience. Once you have had a sip, we know you will be back for more.