Dress up Athletic Wear

Hi all, During my vacations I am generally doing pretty active activities- mostly hiking, biking, or kayaking so I pack mostly active gear. Sometime when I’m going out to dinner or traveling to or from locations I don’t want to exactly look like I’m in active gear but I also don’t have time to change my outfit completely (or I’m away from the hotel and can’t get back). Anyone have any suggestions for a cardigan or anything to dress up athletic wear? It has to be wrinkle resistant and small enough that I can carry it in my day pack. Or even any jewelry suggestions or basically anything that will dress up my athletic wear without taking up a ton of space!

This year I am heading to Switzerland in September and doing a few hikes. So I’m primarily thinking about the train there and back and walking through town!