This icon represents an escape mask. It is a straight line across leading down to a point with a circle in the middle and rounding back around to the top. In the middle is a small rectangle that has an arched rounded bottom.
This is a Escape Mask 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 13,700 icons, all in the same style and quality.