Example
Markup
<label class="specialcheckboxSwitch" for="specialcheckboxSwitchradio1">
<input type='radio' name='specialcheckboxSwitch' id='specialcheckboxSwitchradio1' value='' checked='checked' aria-label="Radio 1">
<i></i>
<span aria-hidden="true">Radio 1</span>
</label>
<label class="specialcheckboxSwitch" for="specialcheckboxSwitchradio2">
<input type='radio' name='specialcheckboxSwitch' id='specialcheckboxSwitchradio2' value='' aria-label="Radio 2">
<i></i>
<span aria-hidden="true">Radio 2</span>
</label>
Source:
build/doc/doc.css, line 4122