post custom meta
WooCommerce AJAX Product Filter - WordPress Plugin
Description: WooCommerce AJAX Product Filter (or WooCommerce AJAX Layered Navigation) adds advanced product filtering to your WooCommerce shop. It provides rich Interface for users to filter products by custom attributes, hierarchical categories and custom post meta fields at realtime. You can build your own store advanced filters with drag and drop in a minute. There is no limit on the number of filters you add to shop; so customers can fi...