There is an air flow within the mask (between it and the skin) due to problems of a bad isolation glue (or whatever) in the nose hoses and in the mouth system. It allows external air go inside, so the desired effect of being isolated and that only can breath through the tubes havent been obtained.
There is an air flow within the mask (between it and the skin) due to problems of a bad isolation glue (or whatever) in the nose hoses and in the mouth system. It allows external air go inside, so the desired effect of being isolated and that only can breath through the tubes havent been obtained.