I'm heading to the Netherlands, Belgium, Luxembourg, and Southern Germany in mid June through early July. It's a credit card tour and I'm packing light with just rear panniers and a handlebar bag. I have fleece-lined leg and arm warmers and I'm now thinking that I just won't need a long sleeve jersey during summer. I figure the coldest that it's really going to get is 50 degrees F (10 C) and at that point I can wear my short sleeve jersey, arm warmers, and my gore-tex jacket. I can certainly fit the jersey but I'd prefer to have the room in my panniers if I don't have to. Thoughts?