Mantle is a free theme for WordPress created by Tom.
Mantle is a GeneratePress child theme. Using GeneratePress you can alter the child theme to your taste in minutes. Mantle is mobile responsive, W3C Markup Validated, Schema.org integrated, search engine friendly, cross browser compatible and 100% translatable. Available in English and German/Deutsch. See more about GeneratePress here http//generatepress.com
(Description "Mantle" Theme from wordpress.org)
You can download Mantle for free via the provided download link and include it into your themes folder of your WordPress installation. Also you can directly search for it in the WordPress admin interface in the themes section and install and activate it from there.
More information, screenshots and reviews of Mantle Theme can be found here.