This Kotwica do wspinaczki 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 a climbing anchor which looks sort of like a curved triangle with its point to the upper right. On the left is a double line representing that the item has depth and then on the item is a circle on the right side and an oblong curved shape to the left inside it.