The 3M 7502 half-mask features a patented exhalation valve for increased durability. The half-mask also features a special nose bridge for less pressure on the nose and extra flexibility.

The 3M 7503 half-mask features a patented exhalation valve for increased durability. The half-mask also features a special nose bridge for less pressure on the nose and extra flexibility.

The 3M 6200 half mask with exhalation valve is easy to attach due to the neck strap. The two-sided filter design of the half-mask provides reduced breathing resistance, better balanced fit and larger field of view.