Elastic ear holder form fitting design Soft non irritating Easy to breathExcellent filtration glasses do not fog water proof Usage:1. Take out the mask, put the frontal side facing out, wear the side straps over the ears.2. Make sure the nose bridge is on the top. Adjust the nose bridge according to the nose shapeto prevent dirty air and dust from inhaling.3. Pull the mask to the lower ja to create the better breathing space.