3M™ maintenance free half mask 4277+ is a simple and ready-to-use respirator with an integrated cartridge and filters. A newly enhanced valve assembly helps to reduce exhalation breathing resistance, and the close-fitting, non-silicone, textured face seal is soft and non-allergenic.

• Ready to use, maintenance free disposable half mask respirator.
• Protection against organic and inorganic vapours, acid gas and particulates.
• Lightweight, low profile and balanced design for comfort in use.
• Enhanced valve assembly reduces breathing resistance and humidity.
• Supplied with resealable bag for convenient storage and transport.