10. Begin to pull the sling through tight one length at a time (i.e. bit by bit, since the sling can never be tightened across its entire width if you only pull one corner). The thumb of the other hand, which is, at the same time, securing the pouch un- der the baby‘s bottom, is positioned under the sling strand and indicates where you need to pull the sling tight. Reach below the thumb and pull the respective strands tight and downwards, transferring the sling one length at a time in the other hand without reducing the tension..