<select class="mdb-select md-form" multiple>

  <option value="" disabled selected>Choose your option</option>

  <option value="1">Option 1</option>

  <option value="2">Option 2</option>

  <option value="3">Option 3</option>

</select>

<label>Example label</label>

<button class="btn-save btn btn-primary btn-sm">Save</button>