Stacks – X includes multiple unique designs inside of one powerful theme, and we refer to these designs as “Stacks.” There are currently four Stacks available in X, with more on the way. It’s like buying one theme and constantly getting access to new designs all the time!
Demo: http://themeforest.net/item/x-the-theme/5871901
Для того чтобы увидеть ссылки и скачать тему, шаблон или плагин необходимо авторизоваться
По материалам themelock