Knix (Makers of Period Undies and Sports Bras) Have Face Masks — They're Great For Workouts!

One of the best features of Knix Freshfix Air Face Masks is that the outer layer is water-repellant. This makes it easy to wipe clean, and I also found it's great for winter outdoor workouts. Any snow that comes from the sky or gets sprayed up by skiing just lands on the mask, melts, and beads off, so the mask stays dry. There is also an intermediate layer with what Knix calls "barrier function," and an internal layer made of microfiber for excellent fit and comfort.