This Honeywell North 7700 Series Half Mask Respirator is made of 100% medical grade silicone. It delivers strong protection against particulates, dusts, fumes, mists, organic vapors, acid gases & other contaminants, and is compatible with all of our N-Series cartridge types for use in multiple applications. In addition to functioning as an air purifying respirator (APR), the 7700 model can easily transition to a powered air purifying respirator (PAPR) or a continuous flow supplied air respirator (CF-SAR). It is also compatible with a backpack adaptor for use in welding and painting applications (all attachments sold separately). The silicone face seal is contoured to best fit different facial areas, and the threaded cartridge connectors prevent accidental disconnection. The cradle suspension features dual-elasticity straps maximizes mobility.