This Hełm zbroi 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 Armored Helmet reduced to a picture of small mid evil helmet. The helmet goes on top of people's heads often paired with a suit of armor for protection during battle. It is like a bike helmet but covered in metal and has face guards as well.