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Bellami Hair Silk Seam Clip-In Extension ($210)

"I couldn't do my job without extensions. They really allow me the versatility to make any hairstyle worth it," Marjan says. Bellami offers many different lengths and shades, made from 100 percent Remy human hair. The extensions use Invisi-Weft technology, making them 30 percent thinner than classic lace wefts. If you're unsure of your color, you can even get color-matched with the Bellami Color Concierge.