material-design-lite/src/icon-toggle/snippets/icon-on.html

Material Design Components in CSS, JS and HTML

<label class="mdl-icon-toggle mdl-js-icon-toggle mdl-js-ripple-effect" for="icon-toggle-1">
  <input type="checkbox" id="icon-toggle-1" class="mdl-icon-toggle__input" checked>
  <i class="mdl-icon-toggle__label material-icons">format_bold</i>
</label>