Product Info: Face-mask 3M (9001/9002) with valve Technical specifications: Appointment: anti-aerosol, smoke, dust, it is also possible to use to protect against acute respiratory infections Type of protection: to protect against dispersed aerosols Respirator type: foldable With expiratory valve: yes Band length adjustment: No. 3M face mask (9334/9324) with molded valve Folding respiratory mask with V design. The fan is firmly fixed to different types of face and follows the movements. It is easy and convenient to transport, store and store during breaks. Magnified filter area. The 3M Cool Flow expiratory valve offers low respiratory resistance, facilitates communication, the exhaled air flow is directed downwards, reducing fogging on glasses, face and sweat. The valve design is unique and has been developed by 3M to more effectively dissipate heat and humidity under the mask. The highly effective filter media provide high quality filtration with low respiratory resistance. The raised outer surface helps the ventilator maintain its shape and does not touch the inside of the face when inhaled. Technical specifications: Appointment: anti-aerosol, smoke, dust, it is also possible to use to protect against acute respiratory infections Type of protection: to protect against dispersed aerosols Respirator type: foldable With expiratory valve: yes Band length adjustment: No. Package Included : 50 PCS MASKS