Material: Remy human hair ( Can Be Dyed,Curled,Straightened,And Washed.)Net Weight: 14inch--170g 16inch--190g 18inch--200g20inch--210g22inch--220g24inch--230g26inch--240gPackage included:1Set (12Pcs) The weight you require is relevant to the thickness of your natural hair or the amount of volume you desire. Clip in hair extensions are the most popular method on the market. Theyre extremely easy to install, which can be done at home in a matter of minutes They are even easier to remove and maintain.1. Wash hair with conditioner to retain moisture and sheen. Shampoo only when hair needs to be cleansed from natural build up.2. Don't knead and twist the hair.3. Comb the wet hair gently by a large toothed comb and drying naturally is best.4. To maintain hair that is healthy, keep styling products to a minimum.