i have made several hats on the AIO using isela phelp's last minute slouchy hat pattern with bernat mosaic, caron simply soft and other yarns. all are warm without the bulky look.
Thanks for your comment Debra! Do you remember how many pegs you used on the AIO? I did Isela Phelp's hat and while I loved how it turned out, it is a little big for my head.