These are KAVIN synthetic straight hair extensions/ hair accessories. They are used to transform your look in seconds. Using this you can have a changed look or a new hair style without coloring or damaging your original hair. These are reusable. Hair Extension is synthetic clip on hair pieces that is easy to apply and available in vivid colors. It can be cut to any length you require and is washable. Be gentle and you could use it for a very long time. Use a comb with broad teeth to straighten the hair, if need arises.