Reusable Half Mask 7500 Series 3M™

The 3M 7500 half mask is a reusable half mask with a soft face seal, available in three sizes and compatible with 3M bayonet filters. It comes in seven configurations depending on size and the filter kit supplied.

Specifications

• Sizes: S, M and L.
• Filter attachment: 3M bayonet, two filters.
• Use: reusable, replaceable filters.

See our compatible filters and cartridges.

Half mask or full face mask

A half mask covers the nose and mouth. It is lighter, cooler and can be worn for longer, but it does not protect the eyes.

As soon as the contaminant irritates the eyes, acids, ammonia, some solvents, you need a full face mask. Safety glasses are not airtight and do not replace this function.

Reading filter markings

The letters indicate the contaminant family: A organic vapours, B inorganic gases, E acid gases, K ammonia. The number, from 1 to 3, indicates capacity. P1 to P3 cover particles, and a combined filter does both.

A particle filter stops no gas, a gas filter stops no particles: this is the most common mistake.

The seal matters more than the filter class

Air takes the easiest path. If the mask leaks at the face, contaminated air goes through the leak and not through the filter, whatever its class.

A few days of beard is enough to make a half mask ineffective. In that case, only a powered air system, working at slight positive pressure, remains effective.

When to change the filters

A particle filter is changed when breathing resistance increases: the signal is reliable.

A gas filter gives no signal and becomes saturated even when not in use, as soon as the packaging is opened, because it adsorbs the ambient air. Writing down the opening date and storing it in a sealed bag between uses are the only two habits that really protect you.