Good points, Irulan.

I'm mostly worried about long, potentially wet descents. Shoot, in Colorado, I'm worried about cold ascents too - the temperatures can drop quickly, so I'm looking for the ideal, perfect dream jacket. One that breathes, one that easily vents, one that is waterproof, and most especially, one that will keep water from dripping down my shorts in between me and my chamois. Between us, that's what worries me the most!