This Zamień 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.
It's a logo of two circular arrows which close back in on each other to make a circular design. The arrows are pointing counterclockwise with one head on the upper right and the other on the lower left. In front of each head are two dots before the other arrow starts.