Used with an approved air source, 3M™ Versaflo™ Hard Hat Assembly, M-307 provides respiratory, head, and eye protection. The 3M™ Versaflo™ Hard Hat Assembly, M-307 includes a premium visor and premium faceseal.The 3M Versaflo Hard Hat Assembly M-307 includes a 3M Versaflo Premium Visor M-927 and 3M Versaflo Flame Resistant Face Seal M-937. The 3M Versaflo Premium Visor M-927 is made of coated polycarbonate and the 3M Versaflo Premium Visor M-927 is made of flame resistant polyester.