slings have shoulder rings which allow you to tighten or loosen them by pulling excess fabric through.
however those slings have a tail like a string or a cord, so only the length of the pouch can be adjusted. you can not tighten just the inside pouch or the outer pouch when you need. this situation happens a lot with “cushion-type” baby slings. you can not tighten the slings because the cushion part can not move through the ring. that is, you cannot be closer to your baby because the cushion gets in the way.however, p-sling’s pouch can be adjustable freely and you can change the inside pouch and the outside 