This W powietrzu 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 image shows a hang-glider with a human outline holding on to it. The human is facing right and holding the bar of the hang-glider with his legs extended out behind him. The hanglider is arrow-shaped and appears to be airborne based on the positioning and angle of itself and its rider.