I'm not sure what you mean? It does seem to be Sarah's weight that makes it much harder for me to loosen the rings. I actually have to take all her weight with my left arm, while I use my right hand to loosen the fabric in the rings (I wear her on my left hip).

I wonder if the silk slings are just easier to loosen than the cotton ones.

And the Zolo is secure all right! I'll give it that....