We provide only the most healthy and youthful hair such as 100 premier remy human hair indian remy hair malaysian human hair russian human hair brazilian human hair peruvian human hair and armenian human hair extensions hair weight 1 grams each strand the average full head will do 100 150 strands but for the thicker hair do need over 150 strands usage can be curled straightened washed and dyed average wear up to 1 year