Just went on my first fall ride - temp was about 44 degrees when we started. I was pretty sure I needed layers, but I wasn't sure what kinds of fabric work best. And, I was really not sure what kind of jacket I should put on top. We are going to ride again early October, which will probably be in the mid 30s when we start. Any suggestions on how I should build my riding wardrobe for year-round riding? What are good investment pieces?