PyroGuard FR® Coveralls are designed to wear over your primary FR clothing. This extends the life of your primary FR, while also protecting it from grease, dirt, and non-toxic liquids. The fabric is made with phosphate-based fire retardant, depriving flames of their fuel source so they don't spread. Better yet, this breathable fabric chars, preventing any flames or molten drips. These coveralls have a high moisture vapor transmission rate (MVTR), helping you to stay cool in hot environments where heat stress is a concern. PyroGuard FR® Coveralls stop flames in their tracks offering the comfort and safety you need in tough work environments.