I have only ever seen one person say that the shoulder of the Zolo is uncomfortable. All the other feedback I read here and on the babywearing Yahoo group says that it is more comfortable than other slings.

I have certainly found the Zolo design to be more comfortable than any other ring sling I have tried. (it's right up there with the KKAFP)

...Karen
Jacob Nathaniel Feb 91
Logan Elizabeth Mar 03