The icon is a picture of two shirts. The shirts appear to be team jerseys with a number 3 on the first one. The icon is used to describe teams.
This is a Teams icon. We've made it in iOS style
, first introduced in iOS version 7 and supported in all later releases up until now (at least iOS 11). This style is based on thin two-pixel lines and is optimized for 50x50 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 13,300 icons, all in the same style and quality.