Can I tie the DIDYMOS sling or the DidySling too tightly?

As a rule, parents tend to tie their children too loosely rather than too tightly in the beginning. To be on the safe side, do the following test: can you get your thumb comfortably but just barely between the back of your baby’s knee and the sling? If there is not enough room for your thumb, you can loosen the sling a little.