The icon is an emoticon type face that is representing a sleeping person or sleepy emotion. The face has closed eyes and turned down mouth with an overall is calm expression.
This icon is a part of a collection of Sleeping flat icons produced by Icons8. Icons follow the guidelines of iOS, Windows, and Android and are designed by a single designer, guaranteeing the consistent quality.
Idea of Sleeping Icon by Stanley Nova
We've received the idea on December 4, 2011 and created the icons on March 21, 2012