<div class="band band-3-col <?php echo $class; ?>">
  <div class="container">
    <div class="row">
      <div class="col-sm-4">
        <?php the_sub_field("left_content"); ?>
      </div>
      <div class="col-sm-4">
        <?php the_sub_field("middle_content"); ?>
      </div>
      <div class="col-sm-4">
        <?php the_sub_field("right_content"); ?>
      </div>
    </div>
  </div>
</div>