As some of you may know from the Prayer Request thread, my mom has cancer, and is starting chemo and radiation some time this month. I thought it would be nice if I were to loom knit a hat or two for her. The pattern is just a simple roll brim hat that can be whipped up during my science and nature tv night. It has very little advice, though, other than a warning that the hat isn't for extremely cold weather.

Could anyone give me any other advice for the hat? For instance, should I use the yarn they recommend? Should I knit it as a roll brim hat or garter stitch the bottom? Any advice would help.