3M 7800S Full Face Respirator with BONUS 3M 7899-100-AM 100pk Lens Covers I bought these unused and surplus from DND, who purchased them from a 3M dealer. They are new in box. Included with the mask is one 100-count box of 3M disposable scratchproof lens covers (item# 7899-100), they prolong the life of the mask by protecting the facepiece from scratches and gouges -- this is a bonus item which does not come with the mask from other vendors. Size small.