I bought both types (with valve and comfort without). I looked on youtube as there are two video's making a comparison. The one in the blue box is better because it has a valve to help breathing and has the two layers inbetween to make filtration N95. The Comfort in white box doesn't have these so protection level is less. With either mask, I wear the surgical mask on top (Fineguard underneith), so wearing two masks me feel safer.