Manufacturer: Alpha Pro Tech Part No. 695 NIOSH Approved These masks are class II medical devices, and are intended for use by operating room personnel during surgical procedures to protect both the patient and the medical personnel from transfer of microorganisms, bodily fluid, and particulate material. Pack of 35 respirators. This is a single-use respirator. Allows total facial closure for "custom fit" on any size face when donned correctly. Soft comfortable materials throughout. Unique elastic retention bands for easy donning. Package Dimensions : 8.5 x 4.96 x 3.35 inches; 12.31 Ounces Date First Available: April 8, 2020 Manufacturer: DH37L ASIN: B086X743W4 Best Sellers Rank: #89,030 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement)#48 in Disposable Respirator Safety Masks