Envy Micro Crystal bonds. This a bond exclusive to Envy Hair Extensions alone, as we spent time and money having this amazing bond specially developed for our company by one of the worlds leading manufacturers. Crystal bond is added to the tip of the extension, it is heated and rolled onto your hair in small sections, approx the size of a grain of rice, so it blends perfectly with your exisyting hair, undetectable and natural feeling, hair can be tied up and still undetectable. When it comes to the time of bond removal (approx every 3 months due to re growth of your hair) our special remover helps the extension easily slide/remove from your hair, then your hair can be re tipped and re attached for a further 3 months. Envy crystal bond is NOT glue and not the same as other bonds which other extensionists use which can possibly damage your hair… Our bond is safe and easily removed. and can be reused.