CYhair's flat weft hair extensions is an evolution of the old version of weft hair extensions. It is lighter, thinner but extremely sturdy. For flat weft hair extensions product, the weaving hair width: 5mm, the thickness of the weave: 1mm. Of course, we're able to customize according to your specific requirements. Made from 100% Vietnamese raw hair, selected carefully through strict quality control inspection. No lice, no tangled, no shedding. No synthetic hair, not mix animal hair. Full of resilience. Can be ironed, dyed, and bleached, and can be made in all styles and use 1-3 years with proper care.