Let's break down the basics into ABCs:
Make sure baby's airway is open at all times, with baby's chin off their chest. At no time should the carrier physically obstruct the baby's airway. The wearer should be able to monitor baby's breathing at all times.
Baby's body should be supported in a way that is developmentally appropriate (newborns have a supported C-curve to the spine, older babies require less head/neck and upper trunk support, etc) and ergonomic.
Your carrier should feel just as comfortable for you as it is for baby! If it is not, stop and adjust. Reach out for support if needed so that you and your baby can have a successful babywearing experience!
Additional Resources not listed above:
The TICKS rule of babywearing also covers the same basic info in a different acronym (this one is used in more European ciricles) - http://www.schoolofbabywearing.com/Images/TICKS.pdf
The Baby Carrier Industry Alliance (BCIA) gives us additional information on carrier safety - https://www.babycarrierindustryalliance.org/dev/wp-content/uploads/2023/06/BCIA-Safety-Brochure-2016-US.pdf
Need something that isn't listed? Let me know and I'll send it to you and probably add it here too! Contact me at amywrapsbabies@gmail.com.