Flame Resistant T-Shirts May Replace Cotton

By Guy Lucas
for Safety Components

The Firehouse Industry Insights blogs are contributed by experts in various areas of the fire service industry.

A hot topic being discussed these days is the idea of fire departments adopting flame resistant base layer garments to replace 100% cotton t-shirts or polyester t-shirts. The U.S. military has already gone through similar evaluations and found inherently flame resistant knits like Sigma™ as the optimum fabric for flame resistant base layers. Explored below are a few reasons why your department may be on the brink of retiring cotton and should be banning polyester t-shirts.

Why replace 100% cotton t-shirts?

100% cotton t-shirts are good for one reason and one reason only…price. Cotton shirts are made of inexpensive cotton fiber and therefore produce inexpensive cotton t-shirts.

The downside of cotton is threefold: poor moisture management, poor color retention, and poor durability.

Moisture Management – You can drop water on top of cotton fabric and it will disappear quickly—the same way certain thermal liner face cloths perform. What happened of course is that the fabric simply absorbed the water, it didn’t wick the moisture, which is an important part of good moisture management. The cotton absorbing fabric becomes heavier and stays wetter for a longer period of time (like thermal liner face cloths that perform the same way). This type of poor performance increases fatigue and makes working conditions hotter and more difficult for the firefighter. It is important that firefighters do not confuse “water absorbent fabrics” like cotton as having good “moisture management”.

Poor Color Retention—Image is Everything In a time where firefighter budgets are threatened every day, the look and image of the firefighter is as important as ever. The fire service needs the support of the public, and a good image is critical in influencing a positive opinion. A shirt that retains color/looks newer for a longer period of time is one that will aid in presenting the firefighter in a positive light. Shirts made of cotton fade and wash out quickly—reducing the usable life of the shirt or risk displaying an unprofessional image.

Subpar DurabilityDurability is the final Achilles heel to cotton under garments. Aside from color retention, cotton wears out quickly and loses strength much faster than fabrics made of high performance fibers.

Read the full article on Firehouse.com.