This ZIP 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.
This icon is a rectangle representing a sheet of paper with the top right corner folded over. The folded corner makes a right triangle and clips off the upper right corner. Inside the rectangle are the letters ZIP.