This is a Honeywell Safety Products known as the Half Mask, model 770030L.
The 7700 Series is the benchmark in half masks. Made from 100% medical grade silicone" the wide sealing area provides exceptional fit and comfort. Cradle suspension features woven straps that provide for maximum mobility without sacrificing support. Easily converts to PAPR or supplied air.
Features:
Improved Comfort and Support
Latex Free
Contoured Sealing Area for Great Fit