If you are looking for a wind jacket you can always have with you then High Coast Lite Anorak is a strong candidate. It can be packed into its own pocket and has all the features you need but nothing unnecessary that will weigh you down. Extra-long zipper at the front, generous fit that makes it easy to pull on/off and a hood that provides welcome protection from the sun. A versatile and light companion on dayhikes, and just as useful for biking to work.
Light, pliant fabric made from partly recycled polyester
Wind resistant and dries quickly
Adjustable hood and generous zippered opening at the front
Two top-loaded pockets, the right-hand one doubles as a pack bag