--- /dev/null
+# media-feature-name-case
+
+Specify lowercase or uppercase for media feature names.
+
+```css
+@media (min-width: 700px) {}
+/** ↑
+ * These media feature names */
+```
+
+**Caveat:** Media feature names within a range context are currently ignored.
+
+## Options
+
+`string`: `"lower"|"upper"`
+
+### `"lower"`
+
+The following patterns are considered violations:
+
+```css
+@media (MIN-WIDTH: 700px) {}
+```
+
+```css
+@media not all and (MONOCHROME) {}
+```
+
+```css
+@media (min-width: 700px) and (ORIENTATION: landscape) {}
+```
+
+The following patterns are *not* considered violations:
+
+```css
+@media (min-width: 700px) {}
+```
+
+```css
+@media not all and (monochrome) {}
+```
+
+```css
+@media (min-width: 700px) and (orientation: landscape) {}
+```
+
+### `"upper"`
+
+The following patterns are considered violations:
+
+```css
+@media (min-width: 700px) {}
+```
+
+```css
+@media not all and (monochrome) {}
+```
+
+```css
+@media (MIN-WIDTH: 700px) and (orientation: landscape) {}
+```
+
+The following patterns are *not* considered violations:
+
+```css
+@media (MIN-WIDTH: 700px) {}
+```
+
+```css
+@media not all and (MONOCHROME) {}
+```
+
+```css
+@media (MIN-WIDTH: 700px) and (ORIENTATION: landscape) {}
+```