  It is well-known that the category of Kleisli algebras for a monoidal monad
carries a canonical monoidal structure. We define the notion of a commutative
graded monad and present a strictly two-categorical proof that Kleisli algebras
for such monads equally carry a canonical monoidal structure which reduce to
the monoidal monad case when the commutative graded monad in question is graded
over the trivial monoidal category.
