I'm thinking about making the leap into the world of wool but I'm completely clueless and have no idea where to start or what all the terms mean. Can someone give me a crash course in the terminology (ie...what the heck is felted?) How do you care for it and what are your favorites? Also, do you use fitted's under the covers or would I have to learn to use prefolds? And a final question. Is wool really comfy? I can't stand wool sweaters - I think they're itchy and hot. We live in Phoenix so I'm worried that not only will it be scratchy but won't it be too hot as well?