best ring sling or wrap for 6 month old?

Olivia • SAHM 🤰🏽 10/17/2016 👦🏼 🤰🏽 8/31/2018 👶🏼 Carter and Leo ❤️
I have a cheap infantino carrier but I'm looking to get a barely used wrap off Craigslist for vacation.... what would you recommend for 6 months and up?