Apply Taxonmy filter in custom loop

Hey, I wrote a custom Loop in order to display my products.

I already created custom post types and categories.

Now I would like to apply a taxonomy filter

in order to display only products of a certain category.

How can I do this ?

Here is my code:

<?php
/**
 * Template name: Sortiment Loop

 */

get_header(); ?>
<?php get_sidebar(); ?>

<?php wp_nav_menu (array ( 'theme_location' => 'secondary') ); ?>

	<div id="primary" class="site-content">
		<div id="content" role="main">

<?php
$args = array( 'post_type' => 'products','posts_per_page' => 10 ); 

$loop = new WP_Query( $args );

while ( $loop->have_posts() ) : $loop->the_post();
	the_title('<h2>', '</h2>');
	echo '<div class="entry-content">';
	the_content();
	echo '</div>';
endwhile;

?>

<?php
if (has_post_thumbnail()) {
  $image_url = wp_get_attachment_image_src(get_post_thumbnail_id(),'large', true);
	echo '';
  the_post_thumbnail();
  echo '';
} else {
    echo '';
}
?>		

		</div><!-- #content -->
	</div><!-- #primary -->

Thanks you very much,

vince