In critical situations in public, such as in subways, when dense dust or smoke can make it difficult to breathe or see, people often panic, not knowing how to escape. The design of Light Breath is similar to a snorkel respirator to help people recognize how to use it intuitively. They simply hold it between their teeth to breathe in clean air. The attached LED on the front is turned on by the pressure of biting the device, giving people use of both of their hands.