Inside Rozy Threading Studio, marigold-yellow walls surround techs as they twirl strings of cotton thread around unwanted facial hair. Then, with a flick of the wrist, they quickly pluck out each strand––a technique that precisely shapes brows and causes less irritation than tweezers or termites. They use this ancient approach alongside waxing to make skin smooth and hairless. When they aren't pruning brows, they purify pores with facials that incorporate extractions, steam, and herbal mud masks.