Saw someone the other day with what looked like a Moby type along BUT instead of tying it it had rings to thread the material through. Had heard of ring slings so googled but it looks like a ring sling has one ring near the shoulder, and this had two at the back (at the bottom of the X). It also had an extra (separate) bit of material tied around the front which looked like the bit on a Moby that you pull up over the front. Does this make any sense?! I love my Moby but am intrigued by an even easier type...