  Let $WB_n$ be the welded (or loop) braid group on n strands, $n \geq 3$. We
investigate commutator subgroup of $WB_n$. We prove that the commutator
subgroup $WB_n'$ is finitely generated and Hopfian. We show that $WB_n'$ is
perfect if and only if $n \geq 5$. We also compute finite presentation for
$FWB_n'$, the commutator subgroup of the flat welded braid group $FWB_n$. Along
the way, we investigate adorability of these groups.
