The North 5500 Series incorporates the comfortable and efficient design of the popular 7700 Series half mask with the low cost and convenience of a disposable. All parts are replaceable, extending the useful life of the respirator. Made of an extremely soft non-allergenic elastomer for comfort and fit. Contoured sealing flange eliminates discomfort caused by pressure points on facial nerves. Design of nose area provides excellent comfort and fit. Low dead air space improves worker comfort by limiting re-breathing of exhaled air. Direct cartridge to face piece seal minimizes replacement parts and simplifies maintenance. Three overlapping sizes comfortably fit most users. North 5500 Series Half Masks are compatible with all North cartridges, filters and accessories.