WP Modify pre_get_posts

wp_pre_get_posts.php

/* Modify $query via pre_get_posts to change sorting
 * of certain archive pages.
 * @link https://codex.wordpress.org/Plugin_API/Action_Reference/pre_get_posts
 */

add_action( 'pre_get_posts', 'custom_query_vars' );
function custom_query_vars( $query ) {
	if ( !is_admin() && $query->is_main_query() ) {
		if ( is_product_category('cleats') ) {
			$query->set( 'posts_per_page', '-1' );  
		}
	}
	return $query;
}