One user of this mask reported that he wore it while riding a Oxybreath Pro Mask Schweiz and it was very comfortable against the skin. Even with his glasses, I did not disturb them. Otherwise he would always have to breathe in the exhaust fumes of his own vehicle or those of the rider in front of him. In the long run this strains his breathing and all the fine dust and exhaust fumes burn in his lungs. Afterwards he had always been nauseous. With this mask, however, it offers perfect protection against all the harmful toxins in the air and he was wrapped up snugly warm with his helmet when the cold wind blew around his ears. He could only recommend it!Click Here