Thinx are washable, reusable period underwear. They look and feel just like normal underwear. They keep you feeling fresh and dry with their built-in protection, are super comfy and machine washable. Thinx’s moderate absorbency cotton modal brief feels soft against the skin and can hold up to three regular tampon’s worth of period blood. These briefs have a waistband that sits at the high hip and has extra back coverage.