Idea of Open Envelope Filled Icon
When you have email messages available to read you will see a envelope with the top flap open and inside a piece of paper. This shows that you have messages available in your email inbox.
This is a Open Envelope Filled 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 13,900 icons, all in the same style and quality.