I've been carrying my Marathon (& previous DC & BV) by the harness straps. I'm getting the impression from other threads that this is not ok. Can I carry it by the tether strap? Am I stuck having to carry it by the shell only?
Do different car seats have different ways to carry them? If so, how is a Frontier carried?
Do different car seats have different ways to carry them? If so, how is a Frontier carried?