[MENTION=392454]CliffordK[/MENTION], I guess the goal will be to make sure the pump doesn't work very hard with each "stroke" so that it is imperceptible.

[MENTION=126124]dwmckee[/MENTION], I've been waiting to offer a good review, but as you know, it hasn't gotten cold yet. I've been wearing it a lot, and while riding the bike, I have to push the sleeves up. So far, it hasn't been passing the doesn't-make-me-too-hot test, but it might do better when the temperature drops. It is impressively light and compressible. Given how much I spent on it, I sure hope it lasts a few years. One flaw I see already is that it ought to have a two-way zipper, the kind that can be zipped up at the top and unzipped at the bottom. I might end up paying someone to install one for me. This is a good way to vent the headwind into my jacket. My rain jacket has this feature, and I really appreciate it.