LaaVoo U Tip Hair Extensions are made with remy human hair, give you the most suitable choice.The terms U Tip/Nail Tip Hair Extension are often used to describe the same thing, which is simply a way of describing the shape of the keratin at the end of each strand. The keratin is shaped in a “u” or “nail” type shape to make it quick and easy to melt against the hair to form a tight sealed bond. SpecificationsBrand:LaaVooExtensions Type: U Tip Hair ExtensionsMaterial: Remy Human HairQuantity: 1g/strand, 50g/PackHow to Apply1. First section hair (Always section hair from the bottom up)2. Insert Separator at root to protect your scalp from the heat 3. Pull Hair through hole of Separator by twisting several hairs and then pulling them through 4.