WooCommerce | Output a list of product attribute terms for a specific attribute

woocommerce-product-attribute-list.php

<?php 

add_shortcode( 'fs-product-special-features', 'fs_product_special_features_img_shortcode' );
function fs_product_special_features_img_shortcode( $atts ) {
	// begin output buffering
	ob_start();

  	// grab the terms of the product's attribute
	$special_feature_terms = get_the_terms($post->ID, 'pa_special-features');
	//$count = count($special_feature_terms);
	if ( ! empty( $special_feature_terms ) && ! is_wp_error( $special_feature_terms ) ){
		echo '<ul class="fs-special-features">';
		foreach ( $special_feature_terms as $special_feature_term ) {
			echo '<li class="fs-special-features-'. $special_feature_term->slug .'" title="' . $special_feature_term->name . '">' . $special_feature_term->name . '</li>';
		}
		echo '</ul>';
	}

	// end output buffering, grab the buffer contents, and empty the buffer
	return ob_get_clean();
}