  For a finite group $G$, $G$-transfer systems are combinatorial objects which
encode the homotopy category of $G$-$N_\infty$ operads, whose algebras in
$G$-spectra are $E_\infty$ $G$-spectra with a specified collection of
multiplicative norms. For $G$ finite Abelian, we demonstrate a correspondence
between $G$-transfer systems and weak factorization systems on the poset
category of subgroups of $G$. This induces a self-duality on the lattice of
$G$-transfer systems.
