Flat, with bi-directional pleats and horizontal ties for largely increased facial comfort and fit. Soft breathable inner lining. Our most popular flat surgical mask, preferred for its comfort and breathability. A tie on surgical mask with horizontal ties, this mask is ideal for surgical and general purpose use. Available with or without an attached face shield. Our most popular flat surgical mask, preferred for its comfort and breathability. A tie-on surgical mask with horizontal ties, this mask is ideal for surgical and general-purpose use. Available with or without an attached face shield.