Fire Protection is a defense gear perk that reduces the fire damage you take. It helps against flamethrower soldiers, incendiary rounds and burning ground.
Fire hurts you less, whether it comes from enemy flamethrowers, incendiary ammo or your own Molotovs. You can push through burning areas with less risk.
Useful early when fire soldiers give you trouble. Upgrade to Major Fire Protection gear once you can.
Flame Retardant puts out flames on you automatically, and Flame Runner adds resistance after sliding.