Post query by Tax query

// WP_Query arguments
$args = array(
	'post_type'              => array( 'product' ),
);

// The Query
$post_query = new WP_Query( $args );

// The Loop
if ( $post_query->have_posts() ) {
	while ( $post_query->have_posts() ) {
		$post_query->the_post();
		// do something
	}
} else {
	// no posts found
}

// Restore original Post Data
wp_reset_postdata();