During the late twentieth century fashions began to criss-cross international boundaries with rapidity. Popular Western styles were adopted all over the world, and many designers from outside of the West had a profound impact on fashion. Synthetic materials such as Lycra, Spandex, and viscose became widely-used, and fashion, after two decades of looking to the future, once again turned to the past for integration. Currently, modern fashion has seen a reference to technology such as designers Hussein and Miuccia Prada who have introduced industrial textiles and modern technology into their fall collections.