Snow Miku is an official derivative design of Miku used as a mascot for the annual Sapporo Snow Festival in Hokkaido. Crypton's offices are situated in Sapporo, and they are one of many sponsors of the event, which takes place all over the prefecture.
The first Snow Miku snow sculpture was built at the event in 2010. In 2012, Miku appeared in a surprise live concert which marked her first outdoor performance. Usually, Miku appears on buses and trains during the week of the festival, and many snow sculptures are built. The design is also used for plenty of merchandise.
Though the first two versions are Miku in a white and blue, snowflake-patterned alteration of her standard design, the designs for 2012 onward are selected in a contest held by Piapro, Crypton's online Vocaloid community, in the months leading to the festival.