This Plus 1 Hour 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 4,600 icons, all in the same style and quality.
This icon consists of an outlined circle representing a wristwatch with a small rectangle placed on the right side representing the crown. Two parallel lines run vertically behind the circle, representing a wrist.