Hair Extension / Colour Hair Extension / Hair streak / Hair highlighter Hair Extension is synthetic clip on hair pieces that is easy to apply and available in vivid colours. 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. Every care has been taken to ensure that the product details are correct. All dimensions are measured by hand, so there might be a very slight variation. Whilst the image is a true representation of the standard product, slight variation in colour replication may occur due to lighting/flash during photography or your monitor settings.