The Fastcap MXV-POCKET 10PK is a Pack of 10 Pocket Dust Masks. Fastcap's new MXV Pocket dust masks are the longest lasting, most comfortable dust mask you will ever wear, and it is reusable. A superior quality filtration system. These high quality dust masks are perfect for general purpose non-toxic applications where dust and particles are present. The Easy Breath exhale valve keeps the dust out and helps prevent the fogging of your safety glasses while you work. It is so comfortable you may forget you're wearing it.