This is an icon showing instructions on how to operate window blinds. There is a picture of the horizontal slats of the blinds and an upwards pointing arrow.
This Curtain icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 5,700 icons, all in the same style and quality.