def download_subtitles(subtitles, pool_class=ProviderPool, **kwargs):
    """Download :attr:`~subliminal.subtitle.Subtitle.content` of `subtitles`.

    :param subtitles: subtitles to download.
    :type subtitles: list of :class:`~subliminal.subtitle.Subtitle`
    :param pool_class: class to use as provider pool.
    :type pool_class: :class:`ProviderPool`, :class:`AsyncProviderPool` or similar
    :param \*\*kwargs: additional parameters for the provided `pool_class` constructor.

    """
    with pool_class(**kwargs) as pool:
        for subtitle in subtitles:
            logger.info('Downloading subtitle %r', subtitle)
            pool.download_subtitle(subtitle)