Get the top level categories assigned to a product

woo.php

function mw_theme_categories( $context )
{
	$args = array( 'taxonomy' => 'product_cat' );
    $terms = wp_get_post_terms( $context['post']->ID ,'product_cat', $args );
	foreach ($terms as $cat) {
		if($cat->parent == 0){
			$out  = '<div class="prodLabel prodLabel--' . strtolower( $cat->name ) . '">';
      $out .= "<a href='/product-category/$cat->slug'>$cat->name</a>";
      $out .= '</div>';
      echo $out;
		}
	}
}