QTHAIR hair extensions are premium quality human hair, which were cut off from one young lady directly, have no chemical treatment,no synthetic, or animal hair. They can be easily Straightened, Curled, Dyed, Bleached and Styled by your favor.Q1:100% Human Hair?A:Testing by BURNING- Human hair will show white smoke while burning and then turn to ash;Synthetic hair will show black smoke and will be a sticky ball after burning.Q2:Hair Length?A: Stretch it to STRAIGHT and then measure.(0.1-0.3 inch margin for error is accepted).Q3:Hair Color?A:Natural Black. All Items are Real Shooting. For display, light, environmental reasons may be a Slight Deviation phenomenon, please in kind prevail.Q4:Hair Smell?A:Our hair is 100% chemical free,but it may have local shampoo smell on it,anyway it will lift your shampoo and conditioner smell shortly after co-wash.Q5:How Many Bundles Do I Need?A:Each bundle is about 100g,the longer the bundle is, the thinner it will be.For a full head,3-5 bundles is necessary; and bundles with closure/frontal will make your hair more natural.Q6:How long it last?A:6months-12months(It depends on your maintainance, and please wash with good shampoo and conditioner regularly to keep its charming).Treat it like your own hair with hair care tips, normally it can last longer than 1 year.Q7:Can I dye it?A:Yes.In general, it?s easier to darken the hair than to lighten it, we recommend to dye darker, since it?s difficult for the original color fade. And dying needs strictly requirement on time and dyestuff, if you are not professional, please go to Salon or contact us for more direction.Q8.Return/Refund Policy?A: We accept no reason return and refund, and please feel free to contact us for the process if you don?t want/like our hair.