Oh, Elk, I see, you want a bag to hold lunch and sweaters and stuff...banana bag too small for that.
Yes the Barley bag is GREAT- I don't have one but I have seen one and examined it in my hands- very NICE. I love the military green too. It's not small but it's also not beastly huge- a perfect size for lots of everyday stuff and errands. The side pockets are very handy for things like cell phones and cigarettes. (just kidding!)

About the riding through winter thing-
DH and I were real happy last weekend there was a gorgeous sunny breezy day that started around 30 degreesF and warmed up to 45 mid afternoon.
We went to breakfast on our bikes before our 30 mile ride, and people kept saying ARE YOU NUTS??? Even cyclists we have riddne with were saying ARE YOU CRAZY?!? We just laughed at them all and had a wonderful sunny crisp refreshing ride, all snug in our multiple thin merino wool layers and feeling toasty and fabulous. Merino wool on our heads, necks, hands, tops, arms, legs, feet....snuggly soft wool that was SO comfy and breathable. Good for riding a few hours out in as low as to 25F or so for us. (And that's wimpy by some other people's standards!) So long as the roads are clear, we are out there riding most of the winter. Freezing rain we definitely stop us though- for that day.
Once you buy some real wool you better get rid of your anti-weeniedom saying, or you'll be kicked out of the Wool Weenies thread!