What I do is I use a very light weight synthetic base layer that I could actually strip down to and be pretty comfortable. This must be something that breathes well and has the ability to dry very quickly. Then on top of that I use either a 100 WT. or a 200 Wt. Polartec Fleece (100 or 200 depending on the temps..) for the mid-layer. I can go like that as long as there are no real strong cold winds or if I get hit by rain and then I have a shell that I can throw over the base and mid-layer to keep the wind off me and to keep me dry too... A water proof hat will really help out too if you are forced to walk in a down-pour...sabre11004...

The first step that you take will be of those that get you there !!!!!