While purchasing a wig or perhaps a hair extension, you always consider its shade, structure and quality. But have you ever thought that what are these hair extensions made of? Well, high quality tresses are prepared with the help of human tresses. They are treated with chemicals so that they can survive for a longer time period. Just in case you’re willing to buy hair, you need to try to find a trustworthy retailer or a provider who can provide you locks regularly.