Details Low profile design allows a wide field of vision. Lightweight makes long period of wear bearable. Soft, elastomeric face-fit secures a lasting comfort. Unique easy to don/doff strap system. DOSH SIRIM Approved The 3M™ Reusable Half Face Mask Respirator 3100. Features include: An elastomeric face seal, S in size, it is a compact and lightweight half mask that offers an economical solution for a range of applications. 3M™ Reusable Half Face Mask Respirator 3100 is suitable for the applications of Automotive manufacturing & maintenance, light duty cleaning and meaintenance work.