I saw that you asked about the Baby K'Tan in the baby ergo thread. A friend of mine loaned me the Moby and the K'Tan originally. The K'Tan is made out of the same material as the Moby, so it would get warm too, especially with the warmer weather. They do make a "mesh" version that would be thinner and cooler though. It's available in black and white.
I think that the K'tan and Moby would get too warm outside in the summer, but for at the mall, or around the house with the a/c it would be fine.
Re: **SnowyBride08** Re: Baby K'Tan
Sorry to butt in...
I have the Baby K'tan Breeze (which is he mesh one hispenguin is referring too) and it's awesome! It is actually made of half mesh and half of the regular stretchy material so you can switch back and forth depending on the weather and where you are wearing it. I highly recommend it!