Technology had a huge impact on the footwear of this decade. Materials such as microfibres, stretch fabrics, and various synthetic materials are used to make the retro styles new again. Technology has also improved the manufacturing process, and computerised embroidery and other new methods of decoration have brought elaborate designs to the mass market. The seventies revival spawned platforms, stilettos, strappy sandals, and high boots. Ecology has become an important theme as we move toward the millennium, and companies like Timberland and Rockport were specially designed for those who wanted to get back to nature. These styles could be seen on the streets and campuses of the United States and Europe.