Gas masks are a type of mask that is designed to filter out harmful gases, like carbon dioxide and methane, from the air. These types of masks are often used by people who work in fields such as coal mining, oil refining, and manufacturing. 

These are a type of respiratory protection device that use filters to remove particles and gases from the air you breathe. They can help protect against dangerous concentrations of particulate matter and other pollutants in the air. You can check out various companies like gas mask pro to buy the high-quality masks for your needs.

There are different types of gas masks and each has its own benefits:

1. N95 masks protect against particles in the air that can cause respiratory problems, such as asthma. They are typically fitted with a filter to capture these particles. 

2. Smashers protect against chemical explosives and gases, such as chlorine or nitrogen dioxide. A blast from these gases can quickly incapacitate someone, so wearing a smasher is essential for safety. 

3. PPE (personal protective equipment) includes both gas masks and smashers. It can protect against toxins released by chemical explosives and gases, blunt projectiles, and fire.

To choose the right gas mask for your needs, take into account your occupation, environment, and personal preferences. Gas masks come in a variety of styles and sizes to fit most faces comfortably.