Product Feature *100% Virgin Human Hair-100% unprocessed remy human hair, one direction cuticles intact,can be dyed and restyled. *Seamless and Invisible-Seamless and damage-free.No glue,with hidden wire,can blend perfectly with your hair color.No one will know you have extensions. *Stainless Steel Clips-Very easy to install, lightweight and will not damage your natural hair, the color and hair color perfect fusion, invisible, tightly stitched in the hair, do not fall off. IG: conniechen77 Some Questions of Customers Care About FAQs -How many sets do I need? 1 set for adding extra volume, 2 sets for adding volume and length. -How can I distinguish the human hair from synthetic hair? The easiest way is to do burning test. Human hair burn out quickly and become ashes.