IFJ_03-2020_PPE_Bieglo Ken Norberg May 27, 2020 20 Views Patented Bigelo three-layer masks for general consumers retain 99.9% of their antimicrobial effect after 30 wash cycles. Photo courtesy of Bigelo Patented Bigelo three-layer masks for general consumers retain 99.9% of their antimicrobial effect after 30 wash cycles. Photo courtesy of Bigelo