- Stiffer fabric construction will not suck into the mouth during heavy breathing.
- Stretchy ear loops with stopper to ensure tightness on any size face
- Adjustable wire nose fitting to ensure tight seal and comfort over long periods.
WHEN TO WEAR
- Sports, running, exercise (sweat-intensive activity)
- Long-haul travel (greater than 5 hours continuous wear)
- Hot (desert or tropical) temperatures greater than 80F / 27C
Adult: 9 inch x 5.5 inch (23 cm x 14 cm)