Coopervision Biomedics XC contact lenses utilize patented PC Technology™ to create a unique material that contains molecules of phosphorylcholine (PC), a substance found naturally in human cell membranes. These PC molecules attract and surround themselves with water keeping Biomedics XC lenses moist and comfortable all day long. Enjoy extended comfort and excellent health in a two week daily/one week extended wear lens worn as directed by your physician. Sold as 6 identical lenses per box. The exact same lenses are also sold under the private label name 2 Clear XC, these lenses are really Biomedics XC.