Have borrowed an ergo omni 360 from sling library. Want to use it tomorrow if not raining. Forcast is quite cold - 8 degrees but ‘feels like’ 4! What do I dress baby in as I know carrier and my body adds heat. Also know you don’t use a snowsuit type outfit. I was thinking vest, baby grow, cardigan, hat and booties? He’s 5 weeks old on Tuesday? Thanks.