<div class="md-form">
    <select class="mdb-select">
        <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>
    <label>Example label</label>

Material Select

Based on the version from MDB (https://mdbootstrap.com/javascript/material-select/)

Using the select element in HTML

Aside from the JavaScript libraries, you need to initialise the Material Select components. This can be done by adding underneath JavaScript and make sure it’s placed after the required JavaScript files used by the framework

// Assuming you've given your Select element a classname of 'mdb-select'