It's made entirelly from steel and glass.
The interior couldn't be simplier. Thanks to large windows and white surfaces the light has no limits giving a natural illumination everywhere. We can also see Mies van Der Rohe's Barcellona chairs, which I personally find adorable (I prefer them white)
I like how the harmonical white goes together with every season of the year. It's minimal use of colour underlines the immense beauty of the nature. Basically we do not need nothing else!
You can read more about it here.