The Half Masks for Gases and Vapors - Large 3M 6300 is economical, low maintenance, easy to install and extremely light. Filters not included. The head harness is designed for a comfortable fit and includes a neckband with quick closure. The face piece is made of very light elastomer for greater comfort during long periods of work. Its low profile design minimizes interference with the field of vision, with a comfortable and secure fit. Its simplicity facilitates its use. The bayonet type connection uses 2 side filters that provide less resistance to breathing, and is a versatile system for gases, vapors and / or particles.