  In this work, we review how the mass and the width of the $f_{0}(500)$ pole
behave in a regime where temperature is below the critical chiral transition
value. This is attained by considering a large-$N$ $O(N + 1)/O(N)$ invariant
Non-Linear Sigma Model (NLSM) such that we can study the dynamical generation
of a $f_{0}(500)$ resonance. Introducing thermal effects via the imaginary time
formalism allows us to study the behavior of the pole and relate it to chiral
restoration.
