I'm not sure what thread they use but it hurts so bad! I've been getting my brows threaded for years and have my go to place but it was booked and this location was near my house so I thought I'd give it a try and I almost cried that's how bad it hurt. The lady doing my brows cut me three times and I knew she did because never have I had a more painful experience. She did not shape my brows or make them thinner like I told her repeatedly. They don't understand basic English words so how are they supposed to know what the customer wants. I had one that was way thicker in the arch then the other I really regret trying a different place because now I wasted my time and money. Go to Diya's eyebrows instead on Sahara you won't regret it.