I heard that a gauze type of material is cooler than the jersey of the moby, but not as soft until you break it in and we dont' have time for that!
Since we already own the ergo... and that is what we will use when the baby gets bigger, so we dont want to buy something else similar to the ergo that is structured. I heard a ring sling is not as comfy as a wrap since wrap can be used with both shoulders support.
Someone told me they prefer the sleepy wrap material over the moby, but not cooler. We dont have any local stores around that carry the sleepy so I can feel material. I guess sleepy wrap stretches more, but is less material.