When selecting a newborn sling carrier, comfort and safety are paramount. First, ensure the carrier provides proper neck and head support for your precious little one. Opt for breathable fabrics to keep both baby and you cool. Adjustability is key—straps and buckles should be easily customizable to accommodate your baby's growth. Look for carriers with wide, padded shoulder straps to distribute weight evenly. Test the carrier's ease of use; you'll appreciate simplicity during hectic moments. Always check for safety certifications, and don't compromise on quality. Lastly, consider a design that allows for discreet breastfeeding if that's part of your journey.