With each mask purchased, we will be donating an additional surgical mask to the professionals at various hospitals all over the U.S. through www.mask-match.com. A Leading Ladies L.A. mask is not intended to act as a medical device or medical product, and Leading Ladies L.A. makes no warranties, either express or implied, that the mask prevents infection or the transmission of viruses or diseases. The mask is not a substitute for professional medical advice, diagnosis, or treatment.