This Sparing 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 an image of two people boxing. One person is throwing a punch to the other person's face. The person being punched is leaning back with one hand forward, and one fist pulled back, ready to punch. The person punching has the other fist pulled back, ready to punch again.