Veronica -

If you wear smalls in Smartwool regularly (and maybe even if you wear mediums), you WILL take an XS in the Smartwool Hoodie. We've all tried them on here in the office and they definitely run big.

Now, that said.... I love love love the MidZero Speedster. I'm wearing one at this very moment. I'm embarrassed to admit it, but I own 4 of them (black, blue, green & chalk ). I wear them ALL the time, and they are fantastic in cold weather. They keep my head, neck and ears warm on cold rides and are sleek enough to easily fit under my helmet. No extra bulk.

My oldest Speedster, in fact (which dates back to when they used to called it the SpeedSkin) is 3 or 4 years old. You'd think it would look trashed, considering how often I wear it, but it still looks great. Almost completely free of pilling anywhere.

I also own one of the Terry Hoodies that VeloBambina mentions ( we used to sell them). I love it for casual wear, but I won't wear it cycling anymore. It's Meryl, which I've come to think is much more appropriate to summer wear than winter. Meryl tends to hold the moisture, and whenever I wear it on cold days & work up a sweat in it, I get very quickly chilled when I take a break (like for food.) It just feels clammy and I have a hard time getting warm again until I really get moving. YMMV, but I'll stick to my MidZero and my Smartwool base layers under my other jerseys.

Susan