It's a logo of a piece of paper with the top right corner folded over to make a triangle shape on the upper right area. Inside are three prominent letter "F"s or in other words "FFF".
This FFF icon is a responsive icon. This means that it's optimized for four resolutions, from tiny 16x16 until highly detailed 80x80. The style comes from the latest Microsoft Office
, which makes it perfect for any Windows applications, in particular, those with ribbon toolbar control. Unlike other icon packs that have merely hundreds of icons, this monster icon pack contains 15,900 icons, all in the same style and quality.