diff --git a/packages/material-ui-icons/README.md b/packages/material-ui-icons/README.md
index 2ac1829db65d3b..bfac7c02eab8ba 100644
--- a/packages/material-ui-icons/README.md
+++ b/packages/material-ui-icons/README.md
@@ -25,7 +25,7 @@ yarn add @material-ui/core
 
 ## Usage
 
-The import path for each Material icon component includes the icon name in PascalCase.
+The import path for each Material icon component includes the icon name in PascalCase. There are two versions provided: filled icon and outline icon. Append `Outline` to the icon name to use the outlined version of the icon (i.e., `@material-ui/icons/InfoOutline`) when available, as not all icons are provided with two versions.
 
 For example to use the 'access alarm' icon component, import `@material-ui/icons/AccessAlarm`.