Straight Arms

Array
(
    [0] => Array
        (
            [meta_query] => Array
                (
                    [0] => Array
                        (
                            [key] => attribute_pa_straight-arms
                            [value] => 11-straight-arm
                        )

                    [1] => Array
                        (
                            [key] => attribute_pa_color
                            [value] => matte-black
                        )

                )

            [post_type] => product_variation
            [post_parent] => 257633
            [posts_per_page] => -1
        )

)