J.B.
I used the nojo sling by dr. sears. I believe his website www.askdrsears.com has other ones available now. They look very much the same. You can also look on craigslist for the nojo. It was incredibly comfortable for all the wearers - me, my husband, the babysitter, and my in-laws who have back problems. My son loved it. It was the only way we could get him to sleep. It was also very easy to transfer him from one person to another while he was sleeping in it. I highly recommend it and it is washable. I tried the ultimate baby wrap before but it fell down all the time and tried a pouch sling from target that basically suffocated my child. It took 3 tries to find the best one. I don't know what I would have done without it. it was a bit costly but it was definately worth every penny! feel free to contact me with any questions.