It's a logo of Santa's hat. On the bottom is a long rectangle curved upwards slightly representing the bottom frill. Then out of that comes the cap part with folds over slightly on top to the right with the circular ball at the end.
This Santas Hat 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 5,700 icons, all in the same style and quality.