This Facepalm 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 4,300 icons, all in the same style and quality.
The foreground of the icon has a person's left hand with all fingers and thumb covering the background which is shaped like that of a person's head. The icon is that of a person covering their face with the palm of their hand as if in disgust or shock.