Good witch Emma Watson's Met Gala look was made out of plastic bottles

In a total Hermione move, Emma Watson showed up to the Met Gala dressed in a very stylish lesson about sustainable fashion. 

Her look, which included a corset, pants and a long black train — kind of a cape for her legs — was made out of recycled plastic bottles. 

IMAGE: GEORGE PIMENTEL/GETTY.

The look is a collaboration between Calvin Klein and Ego Age, who detailed the materials of Waston's dress on Instagram. 

"The body of the look is crafted from three different fabrics all woven from yarns made from recycled plastic bottles, the zippers are made from recycled materials and the inner bustier has been created using organic cotton.