Custom Wordpress Loop with custom fields from types plugin

loop-name.php

<?php 
$args = array( 
  'post_type' => 'post-slug',
  'posts_per_page' => 6
  );
$loop = new WP_Query( $args );
while ( $loop->have_posts() ) : $loop->the_post();
//customfields
$cfname = get_post_meta( $post->ID, 'wpcf-CFSLUGHERE', true);
?>
<!-- begin content here -->
<h1>
  <?php the_title(); ?>
</h1>
<span class="customfield">
  <?php echo $cfname; ?>
</span>

<!-- end content here -->
<?php
  endwhile;
  wp_reset_query();
?>