5.Our U tip human hair extensions can be Treated & Styled (Washing,Curling, Etc.) like your own hair.Please note: body wave hair we do not recommend straightening.If you want to dye the hair, light color can be dyed to darker, but the darker can't be dyed to light. 4.All of the Utip hair pictures are taken by ourselves.If you are not satisfied with the products you have received, we're glad to provide you with a color match or exchange and return service, and we will try our best to help you to solve it. For the best color match and so there is no confusion with color, we gladly offer a free color matching service. 3.Italian Kertain: Utip human hair extensions pre-bonded hair are made of high quality Italian Keratin Glue, which is both soft and sticky to the hair, and is hot-melt and durable to install and easy to remove as well. 2.Specification: Length: 16-24 inch. Weight: 50G/50S 1g/ strand. We recommend 2 packs for adding some fullness, but for a full head, we usually suggest 3-4 packs U tip hair extensions to get more thicker hair. 1.Moresoo U tip keratin hair extensions human hair is a perfect choice for people who is looking for long-term extensions.No tangles, no shedding, no split ends in our hair.Utips Hair Extensions are popular among professional stylist and salons, because it is more invisible.