<select id="not-initialized-select" class="mdb-select md-form" multiple>

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

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

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

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

  <option value="4">Poland</option>

  <option value="5">Japan</option>

</select>

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

​

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

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

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

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

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

  <option value="4">Poland</option>

  <option value="5">Japan</option>

</select>

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

​

// Material Select Initialization

$(document).ready(function() {

$('#initialized-select').materialSelect();

});