Hi Travbjork,
We use Indian Remi hair. It's the most common type of hair available. We can also offer Chinese Remi hair for those that want a thicker hair shaft--no extra cost. But Indian Remi is the closest to European hair shaft size. Many places say they have European virgin hair but they're just using that to bump up the price. You'd have to put it under a microscope and compare it to Indian Remi to see any difference. And of course the cost of the hair would be several times the cost of Indian Remi hair.
Regards,
John