  We investigate the strange particle composition of the early Universe in the
hadron epoch $T_h\approx 150\ge T\ge 10$\,MeV. We study strangeness yield in
thermal and chemical equilibrium constrained by prescribed entropy per baryon
in a charge neutral and strangeness neutral $\langle s-\bar s\rangle$ Universe.
Turning to kinetic processes in a Hubble expanding Universe, we determine
conditions at which individual strangeness producing reactions fall out of
detailed balance between decay and back-reaction strangeness production rates
in presence of decreasing temperature $T$; we allow for weak, electromagnetic,
and strong interaction processes. The weak interaction
$\mu^\pm+\nu_{\mu}\rightarrow K^\pm$ freezeout is at
$T_f^{K^\pm}=33.8\,\mathrm{MeV}$; the electromagnetic process
$l^-+l^+\rightarrow\phi$ freezeout is at $T_f^\phi=23\sim25\,\mathrm{MeV}$; and
the hadronic reaction $\pi+\pi\rightarrow K$ freezeout is at
$T_f^K=19.8\,\mathrm{MeV}$.
