G & F Particle Respirator Non-Toxic Dust Mask features Lightweight and Easy to Breathe Through, Adjustable Metal Nose Strip for Custom Fit, Comfortable Elastic Headband, Filters Nontoxic Dust, Pollen, Dander, Sawdust, etc. found in Workshop, Garage, Garden, Household and Workplace. There are 50 masks per box allowing for multiple DIY projects.