The transparent section that makes the wearer¡¯s lips visible, making lip-reading and making out the speaker¡¯s facial expressions possible. Made of high quality material, soft to the touch, durable, washable, reusable, comfortable to wear and easy to breath. Ideal to protect your mouth from dust, pollen and other fine particles in the air. Ideal for cycling, camping, running, traveling, climbing and daily use. Facial expressions and lip-reading are key for deaf people to understand others.