  We investigate a mechanism to transiently stabilize topological phenomena in
long-lived quasi-steady states of isolated quantum many-body systems driven at
low frequencies. We obtain an analytical bound for the lifetime of the
quasi-steady states which is exponentially large in the inverse driving
frequency. Within this lifetime, the quasi-steady state is characterized by
maximum entropy subject to the constraint of fixed number of particles in the
system's Floquet-Bloch bands. In such a state, all the non-universal properties
of these bands are washed out, hence only the topological properties persist.
