The hair we are selling has not been treated in any way; it's virgin (cutucle) single drawn hair. It is sold in bundles/tails (gathered from the same head).Hair has not been dyed, it is in natural remy state; we have variety of colours from blond to dark brown, but usually blond are more expensive.If you are interested in a particular (natural) colour we can supply it you. With regards to wavy or curly hair, we do collect wavy hair in its natural state, and that we can supply to you.