Scott AV-3000 Facepieces With Kevlar Head Harness. Size: Medium Polycarbonate lens meets the faceshield impact and penetration requirements of ANSI Z87.1 paragraphs 5.2.8.1 and 5.2.8.2, and the lens abrasion requirements of NFPA1981 Comfort Seal* faceseal with a large sealing area for a better hood-to-facepiece interface Easy-to-don, six-point, quad-suspension net hood Larger multidirectional voicemitters provide enhanced clarity in voice communication Simplistic clam shell design for decreased part changeout